Gatecrash

Battalion — Whenever Daring Skyjek and at least two other creatures attack, Daring Skyjek gains flying until end of turn.

Equipped creature gets +1/+0 and can't be blocked by creatures with flying. Equip {3} ({3}: Attach to target creature you control. Equip only as a...

Bloodrush — {1}{G}, Discard Scab-Clan Charger: Target attacking creature gets +2/+4 until end of turn.

Arrows of Justice deals 4 damage to target attacking or blocking creature.

Draw a card. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, ...

Spire Tracer can't be blocked except by creatures with flying or reach.

Whenever Slate Street Ruffian becomes blocked, defending player discards a card.

Bloodrush — {1}{R}{R}, Discard Scorchwalker: Target attacking creature gets +5/+1 until end of turn.

Target creature gets +3/+0 until end of turn. Target creature gets +0/+3 until end of turn.

Whenever another blue creature enters the battlefield under your control, target player mills two cards.

{1}, {T}: Razortip Whip deals 1 damage to target opponent or planeswalker.

Prevent all damage that would be dealt to target creature this turn.

{1}{R}{W}: Creatures you control get +1/+0 until end of turn. {2}{R}{W}: Create a 1/1 red and white Soldier creature token with haste.

When Urbis Protector enters the battlefield, create a 4/4 white Angel creature token with flying.

Return target creature card from your graveyard to your hand.

Battalion — Whenever Bomber Corps and at least two other creatures attack, Bomber Corps deals 1 damage to any target.

{1}{W}, {T}: You gain 2 life.

Equipped creature gets +1/+2. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Flying

Creatures you control get +2/+2 until end of turn.

Battalion — Whenever Nav Squad Commandos and at least two other creatures attack, Nav Squad Commandos gets +1/+1 until end of turn. Untap it.

Whenever Fortress Cyclops attacks, it gets +3/+0 until end of turn. Whenever Fortress Cyclops blocks, it gets +0/+3 until end of turn.

Create an X/X green Ooze creature token, where X is the greatest power among creatures you control.