Mishra, Claimed by Gix [The Brothers' War] Play Booster You may have Mockingbird enter

You may have Mockingbird enter as a copy of any creature on the battlefield with mana value less than or equal to the amount of mana spent to cast Mockingbird

defying Elesh Norn's commands

Murktide Regent enters the battlefield with a +1/+1 counter on it for each instant and sorcery card exiled with it

you can add character from Big Hero 6 and Rescue Rangers to your trusty crew

Mishra, Claimed by Gix [The Brothers' War] Play Booster You may have Mockingbird enterSet: The Brothers' War Type: Legendary Creature Phyrexian Human Rarity: Mythic Cost: {2}{B}{R} Whenever you attack, each opponent loses X life and you gain X life, where X is the number of attacking creatures. If Mishra, Claimed by Gix and a creature named Phyrexian Dragon Engine are attacking, and you both own and control them, exile them, then meld them into Mishra, Lost to Phyrexia. It enters the battlefield tapped 9 9 and attacking.