Menace At the beginning of your end step, put a bounty counter on target creature an opponent controls. For as long as that creature has a bounty counter on it, it has "When this creature dies, each opponent draws a card and gains 2 life."
Equipped creature gets +3/+0 and has trample and lifelink. Equip {3}
Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.) Other creatures you control have dethrone. Whenever a creature you control with a +1/+1 counter on it dies, return that card to the battlefield under your control at the beginning of the next end step.
Enchant player Whenever enchanted player is attacked, create a colorless artifact token named Gold. It has "Sacrifice this artifact: Add one mana of any color to your mana pool." Each opponent attacking that player does the same.
Enchant player Whenever enchanted player is attacked, you draw a card. Each opponent attacking that player does the same.
When Mairsil, the Pretender enters the battlefield, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it. Mairsil, the Pretender has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn.
{U}, {T}, Sacrifice Magus of the Mind: Shuffle your library, then exile the top X cards, where X is one plus the number of spells cast this turn. Until end of turn, you may play cards exiled this way without paying their mana costs.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {1}, Sacrifice Qasali Pridemage: Destroy target artifact or enchantment.
Equipped creature gets +2/+2 and has lifelink and trample. Equip {3}
Flash When Portal Mage enters the battlefield during the declare attackers step, you may reselect which player or planeswalker target attacking creature is attacking. (It can't attack its controller or its controller's planeswalkers.)
Indestructible {T}: Add one mana of any color to your mana pool.
Cats you control have protection from Rats. (They can't be blocked, targeted, or dealt damage by Rats.) At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch. Whenever a Rat dies, put a +1/+1 counter on each Cat you control.
When Vindictive Lich dies, choose one or more. Each mode must target a different player. • Target opponent sacrifices a creature. • Target opponent discards two cards. • Target opponent loses 5 life.
{1}: You may cast target creature card in a graveyard this turn. When you cast that card this turn, Havengul Lich gains all activated abilities of that card until end of turn.
When Stalking Leonin enters the battlefield, secretly choose an opponent. Reveal the player you chose: Exile target creature that's attacking you if it's controlled by the chosen player. Activate this ability only once.
For each creature target player controls, create a token that's a copy of that creature.