Gatecrash

Casting Cost:

Flying, vigilance, haste

Whenever Aurelia, the Warleader attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase.

(: Add  or  to your mana pool.)

As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, Breeding Pool enters the battlefield tapped.

Casting Cost:

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)

Whenever you tap a Swamp for mana, add  to your mana pool (in addition to the mana the land produces).

Casting Cost:

+1: Look at the top card of your library. If it's a creature card, you may reveal it and put it into your hand.

-2: Target creature you control fights another target creature.

-7: You get an emblem with "Creatures you control have double strike, trample, hexproof, and haste."

Casting Cost:

+1: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls.

0: Until end of turn, Gideon, Champion of Justice becomes a Human Soldier creature with power and toughness each equal to the number of loyalty counters on him and gains indestructible. He's still a planeswalker. Prevent all damage that would be dealt to him this turn.

-15: Exile all other permanents.

(: Add  or  to your mana pool.)

As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, Godless Shrine enters the battlefield tapped.

Casting Cost:

Hexproof

Whenever a creature card is put into an opponent's graveyard from anywhere, you may have Lazav, Dimir Mastermind become a copy of that card except its name is still Lazav, Dimir Mastermind, it's legendary in addition to its other types, and it gains hexproof and this ability.

Casting Cost:

Haste

Battalion — Whenever Legion Loyalist and at least two other creatures attack, creatures you control gain first strike and trample until end of turn and can't be blocked by creature tokens this turn.

Casting Cost:

Flying

Whenever Lord of the Void deals combat damage to a player, exile the top seven cards of that player's library, then put a creature card from among them onto the battlefield under your control.

(: Add  or  to your mana pool.)

As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, Sacred Foundry enters the battlefield tapped.

(: Add  or  to your mana pool.)

As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, Stomping Ground enters the battlefield tapped.

: Add  to your mana pool.

, : Thespian's Stage becomes a copy of target land and gains this ability.

(: Add  or  to your mana pool.)

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, Watery Grave enters the battlefield tapped.