
Sothera, the Supervoid | Legendary Enchantment | | Whenever a creature you control dies, each opponent chooses a creature they control and exiles it.
At the beginning of your end step, if a player controls no creatures, sacrifice Sothera, then put a creature card exiled with it onto the battlefield under your control with two additional +1/+1 counters on it. | Dominik Mayer

Tannuk, Steadfast Second | Legendary Creature | Kavu Pilot | Other creatures you control have haste.
Artifact cards and red creature cards in your hand have warp {2}{R}. (You may cast a card from your hand for its warp cost. Exile that permanent at the beginning of the next end step, then you may cast it from exile on a later turn.) | Raymond Swanland

Ouroboroid | Creature | Plant Wurm | At the beginning of combat on your turn, put X +1/+1 counters on each creature you control, where X is this creature's power. | Samuel Perin