Umbo, Mistveil Plunderer

Whenever Umbo attacks, create Kama, a
legendary 3/1 red and white Wolf Spirit creature
token with ''Prevent all damage that would be
dealt to Umbo.'' Kama enters the battlefield
tapped and attacking. Exile it at end of combat.
Whenever Umbo deals combat damage to a
player, you may have it phase out. If you do,
create a tapped Treasure token.