My take on a Mostly-White Heroic build for Penny Dreadful. The basic game plan is to get out Phalanx Leader , a few other creatures, then buff everyone by targeting your Leader. Still in development.

Reasons for each card in mainboard:

Phalanx Leader -- the inspiration for this deck.

Akroan Skyguard -- flying is a useful evasion tactic

Fabled Hero -- a 2/2 doublestriker for 3 is good. A 2/2 doublestriker with heroic is better

Favored Hoplite -- For those situations that you don't start with a tapland. Also has decent stats/abilities

Topan Freeblade -- a 2 drop 2/2 with vigilance is nice. Fits good on the curve

Vanguard of Brimaz -- can literally create an army for you

Ajani's Presence -- Protects your creatures and triggers heroic

Artful Maneuver -- a decent combat trick that triggers heroic 2 turns in a row

Emerge Unscathed -- protection and heroic trigger 2 turns in a row

Prey Upon -- semi-removal that triggers heroic. The only downside is that it's a sorcery

Selesnya Charm -- can trigger heroic, get rid of a powerful threat, or create a blocker

Reason for each card in sideboard:

Banisher Priest -- A good add-in for when you need more creature-removal

Center Soul -- Useful against burn/MBC type decks that want to target your creatures with spells

Mighty Leap -- Mainly because I had this in the mainboard at one point; still useful against decks with lots of flyers

Naturalize -- Good against affinity-like builds or other decks that rely on artifacts/enchantments to win