Oxpecker

Flying

When Oxpecker enters the battlefield, choose a
creature you control with power 4 or greater. Put a
+1/+1 counter on that creature.
Whenever the chosen creature attacks, Oxpecker
gains lifelink until end of turn.

"In the savanna's embrace, oxpeckers strengthen
their allies, and find nourishment in return."
— Naturalist's Journal