MenaceWhen Massacre Girl enters, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.
Creatures you control have vigilance.+1: You gain 3 life.−2: Put a +1/+1 counter on each creature you control and a loyalty counter on each other planeswalker you control.
Whenever a creature you control with deathtouch deals damage to a player or planeswalker, put a +1/+1 counter on that creature.−2: Create a 1/1 black Assassin creature token with deathtouch and "Whenever this creature deals damage to a planeswalker, destroy that planeswalker."
Choose any number of target creature and/or planeswalker cards in graveyards. Command the Dreadhorde deals damage to you equal to the total mana value of those cards. Put them onto the battlefield under your control.
Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature.+1: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying.−3: Create a 4/4 red Dragon creature token with flying.
Blast Zone enters with a charge counter on it.: Add ., : Put X charge counters on Blast Zone., , Sacrifice Blast Zone: Destroy each nonland permanent with mana value equal to the number of charge counters on Blast Zone.
Spells and abilities your opponents control can't cause their controller to search their library.−1: Target player mills four cards. Then exile each opponent's graveyard.
During your turn, creatures you control have first strike and equip abilities you activate cost less to activate.−X: Nahiri, Storm of Stone deals X damage to target tapped creature.
Whenever you attack with two or more non-Gideon creatures, put a +1/+1 counter on each of those creatures.+2: Until end of turn, Gideon, the Oathsworn becomes a 5/5 white Soldier creature that's still a planeswalker. Prevent all damage that would be dealt to him this turn. (He can't attack if he was cast this turn.)−9: Exile Gideon, the Oathsworn and each...
FlyingWhen Niv-Mizzet Reborn enters, reveal the top ten cards of your library. For each color pair, choose a card that's exactly those colors from among them. Put the chosen cards into your hand and the rest on the bottom of your library in a random order.