Valkyrie Avriella

Flying, first strike, lifelink
Other creatures you control get +3/+0 and have haste and trample as long as it's your turn.
Whenever a creature you control dies in combat, Valkyrie Avriella deals damage equal to that creature's power to target creature or player.
"She did not believe humans deserve protection just by existing so she became Valkyrie." - Avalyria