Geralt of Rivia

At the beginning of combat on your turn,
creatures you control get +3/+3 and gain
trample until end of turn.
{1}{g}: Until end of turn, target land you
control becomes a 1/1 Elemental creature
with vigilance, indestructible, and haste. It's
still a land.
Partner (You can have two commanders if
both have partner.)