Over the weekend, five Dota 2 players won millions of dollars at The International 2015 thanks largely to one amazing play, which quickly became known as the Six Million Dollar Echo Slam.

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Step 1: CDEC picks off one of EG's heroes

Several friends not versed in Dota have asked me about "that play," which exploded on social media and YouTube after TI5 concluded on Saturday. Watch it for yourself in the video below.Dota is a big and complex beast, so let's demistify the crazy colors and sounds and let everyone know exactly why this play was so devastating.To start off, the stakes: The final series of TI5 included two teams - A North American team called Evil Geniuses (EG), and a Chinese team called CDEC. It was a best-of-five series, so the first team to three victories wins the championship. EG had a 2-1 lead heading into game four.Then this happened...Editor's Note: Click the images for a closer look.CDEC found one of EG's players roaming on their side of the map. Even though his character is very good at escaping bad situations, CDEC skillfully chains together their stuns to keep him from fleeing. They kill him with a powerful ultimate skill.

Step 2: CDEC heads into the Roshan pit

After CDEC secures the kill, team EG only has four players (each team has five players total) until the dead hero can respawn in about 40 seconds. When you outnumber the enemy, it's common to try to kill Roshan while you have the advantage. Roshan is a powerful dragon located near the river, and when you kill him, your whole team receives gold and experience.More importantly, Roshan drops an item that gives its holder a free second life after dying. If you have that item, you can take riskier fights because you essentially have six lives to spend versus the other team's five lives. CDEC moves toward Roshan, but the four remaining EG players spot CDEC's movement.

Step 3: EG decides to contest CDEC

CDEC enters the pit and starts attacking the dragon. Because the pit is a small, enclosed area, CDEC's team members must stand closely together. The heroes EG drafted for this particular match are excellent at killing clustered heroes.EG's captain is playing a hero that has the ability to slow all enemies and increase thedamage they take. He casts this spell into the pit. It's the blue-white swirly shape on the ground in the picture below.At this point, CDEC is made aware that EG knows they're in the pit. Because CDEC refuses to flee the pit, they're either confident or desperate.

Step 4: Here come the ultimates

After casting that spell into the pit, EG's captain follows it up with his ultimate ability. It's a two-part skill excellent at taking out multiple enemies. Think of it like a laser-guided missile. The first part tells it where to go, and then the second part comes in and does a blast of icy damage. You can see the targeting round entering the Roshan pit from the left side in the picture below.Keep in mind that this ultimate does magical damage, so the spell already spinning on the ground will increase the ultimate's damage even further.

Step 5: SLAMMIN!

Before the second part of the ultimate follows through, another EG player jumps into the Roshan pit. The player is using a hero named Earthshaker. He leaps into the middle of all five CDEC players using an item that lets you instantly teleport to a nearby location.Earthshaker's ultimate, Echo Slam, is a massive area-of-effect blast that does more damage when more enemies are caught in its radius. All five of CDEC's players are caught in the skill, which is a rare feat against professional players who generally do a great job of spreading out.And yes, Echo Slam causes magical damage, so it's also amplified by that swirly thing on the ground. And it stuns opponents.

Step 6: About that Ice Blast...

After the massive Echo Slam, all five CDEC's heroes are immobilized. With CDEC unable to flee in time, part two of the previously-cast icy ultimate enters the pit and explodes in a burst of magical damage, instantly killing one of the five CDEC players. After the initial dose of damage, it continues to do damage over time to the remaining enemies.That skill also applies a nasty effect to CDEC's heroes. If their health bars reach a certain threshold, they'll instantly shatter and die. Granted, that threshold is pretty low at 10-12%. But still, CDEC is getting close to that territory.

Step 7: The Fissure of fate

Earthshaker's Echo Slam is on cooldown, but he still has other abilities. One of them shoots out a wall of rocks that stuns enemies, causes damage, and blocks paths. Earthshaker throws the wall to the left so it will collide with the CDEC hero on the edge of the pit, because she has more health than most of her teammates.The two enemies near Earthshaker take magical damage (still amplified!) and a stun, thanks to one of his passive abilities. They're instantly killed, and the rocks knock the far-left CDEC player's health below the threshold. She shatters because she's still under the lingering secondary effect of the EG captain's icy ultimate.Only one CDEC player is still alive at this point.

Step 8: And then there was one

EG's carry player casts his ultimate ability into the pit in an attempt to mop up the last living CDEC player, but that player's hero is very good at escaping from bad situations. He teleports out of the Roshan pit to the right and escapes what would have been certain death for many heroes.

Step 9: EG steals Roshan

Already weak from CDEC, EG easily kills Roshan and takes the gold, experience, and the second-life item for themselves. EG was already doing quite well before the fight, so this battle pushed their advantage even further ahead. They won the match soon after, and with it, the title of TI5 champion.

During TI5, Valve revealed a 20-player Dota 2 mode , which is considerably busier than the standard 5v5. Valve also says it "expects" two new heroes to be out by TI6

Brian is an Editor at IGN. You can follow him @albinoalbert on Twitter