Woo, extra-long, extra-fighty chapter as apology for my tardiness! Also some semblance reveals, I guess.

Soundtrack while writing this chapter was The Clarion Call by Falconer.

Summer Rose dodged a blow that sent out a shower of splinters in all directions, her blonde opponent rearing back to bring down yet another fist at the diminutive girl. If only she could get enough breathing room to activate her semblance again, she could slip away and regroup. But as she vaulted over her future step-daughter she had no time to prepare for the black ribbon that suddenly found itself wrapped around her arm, and with a firm tug from Blake, she found herself smacked into the wooden wall of the arena. The last thing she saw before the blunt end of a red and black sniper-scythe sent her tumbling into the darkness of unconsciousness was a twenty year old chain-axe blade-shaped gash in the wall in front of her face.

~20 minutes earlier...

"Oh-ho-ho-ho, you did not just say that!" Yang stared disbelievingly at her future father.

"Sure did, firecracker; we in STRQ can wipe the floor with team RWBY any day of the week. It's only logical, I'm quite literally 'your daddy'."

"The expression 'who's your daddy?' doesn't work that way, Tai."

"Stuff it, Qrow. Paraphrasin' here." Ruby walked over to the young members of STRQ with an unamused look.

"But 'dad', you're only freshmen – we're in our junior year here. The difference in skill level is not favourable for you." Tai snorted.

"Bring it, shorty." Ruby looked up into the eyes of the younger boy, the right corner of her mouth twitching slightly in sync with her eyebrows. Then she snapped her head towards her team.

"Blake! Find an unoccupied combat class arena and book us for the hour! We're going to settle this dispute." Blake tapped away at her scroll. Finding a suitable locale, she filed an appointment and turned to the rest of the two teams.

"We've got hall number 3102 in five minutes."

Team STRQ's chins dropped. Dust.

Some time later, the two teams were facing each other in the arena. Yang punched her fist into the palm of her left hand.

"Hope you don't mind me taking out some frustration on you guys, got a lot of things I wanna de-stress from…" Raven smirked coolly.

"You go right on ahead with that, Yang… Just know that 'mommy dearest' will respond in kind…"

"Heh. Bring it."

As the adult Taiyang shouted "Begin!" from the bleachers accompanied by JNPR, the two teams lunged forward as Yang ran towards her 'mother', she saw Summer disappear into thin air. Invisibility semblance? On a second glance as she simultaneously dodged a swipe from Raven, she saw that Summer hadn't actually disappeared. She was like a human chameleon, blending in with the surroundings and making her incredibly hard to spot. She dropkicked Raven in the gut and raced towards the hazy image of her stepmom as she advanced on Ruby, seemingly not yet noticed by the young leader who was having an intense scythe-duel with Qrow. But just as she jumped to tackle Summer away from Ruby, a dark portal formed in her path and she fell into a rolling dodge at Raven's feet.

"You're fighting me now, focus." Yang allowed herself a quick glance at her sister, who had thankfully noticed the danger and was now fighting both Summer and Qrow. Suddenly two of Blake's shadow copies jumped Qrow and tore him away from his opponent. Suddenly two arms were locked around Yang's throat. Tai lifted his daughter from the floor as he bent backwards.

"Not so cocky now, are you? Told you you girls were no prob, two years older or not." As stars began to flicker at the corner of Yang's eyes, she saw Weiss swiftly engage Summer in defence of her partner, then quickly skidding over to kick the approaching Raven away from Yang, simultaneously putting an angled glyph in the air at hip-length in front of her choking teammate. Quickly understanding what Weiss had in mind, Yang swung up her boot soles on the glyph and kicked off, toppling Tai backwards hard into the floorboards with a loud thud.

"Now stay down. Your aura's almost in the red." Tai grinned as he swung around onto his stomach, then got up on his knees.

"No can do, firecracker. Remember that for you guys to win you'll have to take us all out, and I can't have that happen." He punched a fist to his shoulder pauldron, who unfolded into his custom-built armguard.

"Don't know if your old man ever showed you our weapon, so here you go." He walked slowly and menacingly towards Yang as he spoke.

"Likewise I can't tell if he ever told you about his semblance… So let me show you that too." He ran the last half metre to Yang and swung his gauntlet with all his strength into her stomach. As he activated his semblance, the stored energy from when Yang threw him to the ground exploded from his clenched fist.

"Yep. Tai's a goner." Nora looked quizzically up at Taiyang.

"Whatchu mean by that, Mr. T?"

"Basically, my semblance is similar to Yang in that we both absorb incoming force." He gestured towards Yang.

"While she uses the energy to gain strength…" he gestured again towards his younger self.

"… I absorb the energy and can later release it as explosive force. The gauntlet I devised as a sort of focusing tool." Taiyang glanced up towards the aura counters on the wall – RWBY's was barely halfway empty, while STRQ had lost Qrow and Raven, and Summer and Tai was teetering dangerously close to the red zone.

"Now I don't really know how hard Yang knocked 'me' on my ass back there, but that explosion should not only help Yang knock Tai into red, but might even deplete his aura completely." Taiyang reached over to grab some of Jaune's popcorn (receiving a cold glare from Pyrrha in the process), then continued to watch the game.

"Well that certainly is a useful trick." Yang stumbled backwards a few steps until she righted herself. Tai grinned.

"It comes in handy every now and then." Yang chuckled.

"Now why couldn't you keep that good humour into your elderly days? I'd need to chat with daddy later I think. But now I really should be focusing on you, yeah?" She strode up to him and looked him in the eyes.

"… Incidentally, that's how silly your tough guy act looked earlier. And since you were so kind to show me your semblance, maybe I should show you mine." Yang smashed her fists together, erupting into a massive conflagration for a split second. Tai didn't get a chance to put up any sort of defence as he was sent flying with an uppercut to the chin.

As his aura screen greyed out, Taiyang called out the defeated as acting judge.

Now only Summer remained against the entirety of team RWBY. Once again camouflaged, she swiftly avoided a veritable hailstorm of icicles from Weiss, her chameleon semblance not quite keeping pace with the fractal gleaming of the projectiles, leaving her a shimmering phantom. As she swung her chain-axes at Weiss to disrupt her offence, Blake threw the ribbon of Gambol Shroud, neatly redirecting the sharp blades away from their intended target. Suddenly Summer was assailed by shotgauntlet blasts from Yang.

"Sorry Sum, but it's about time we finished this match." Weiss shrouded the young girl in a thin layer of snow, betraying her form and making her camouflage temporarily ineffective. Yang and Ruby lunged at their final opponent...

"Told you we'd kick your collective behinds." Yang patted Tai on the back as he rubbed his aching chin.

"Yeah yeah, rub it in why don'tcha…"

AN: Tai underestimates his opponents. Chapter one told us as much. Maybe Taiyang'll beat it out of him before STRQ go home to their own time.

Interesting semblances for Tai and Sum, yes? I didn't want her to have full invisibility, so I gave her "human chameleon" instead.

If you're having trouble separating old and young Taiyang, "Tai" means time-traveller while Taiyang (full name) is Daddy.

I do not own RWBY, that's RoosterTeeth and Monty Oum.