Mirkwood Bats is going to do nutty things if youre playing a Treasure deck, or some sort of token-heavy Aristocrats-style deck
2-Mana Removal When it comes to cheap, reliable answers, Infernal Grasp and Go for the Throat are two of blacks best options
Example: Thoughtseize should be bad in Grixis Deaths Shadow against Abzan as the matchup is so grindy, but you need a way to stop Liliana of the Veil before it hits the battlefield and uses its -2 ability
Similarly, a card like Ognis, the Dragon's Lash is considered a Jund commander and a tri-color card
Its incredibly difficult to cast this spell and not win the game or at least eliminate a player, but you can also use it against board wipes, targeted removal, or a potential alpha strike from an opponent
Creature - Warrior Elf Cleopatra, Exiled Pharaoh Allies At the beginning of your end step, put a +1/+1 counter on each of up to two other target legendary creatures