Arni's Epic Tale

l I, II l As long as a creature you control named Arni of Epic Tales is attacking, it gets +2/+0, trample and indestructible.
l III l Arni's Epic Tale does damage equal to Arni of Epic Tales' power to a legendary creature you don't control.
l IV l After your next combat phase, untap all creatures you control. There's another combat phase after that phase. During this extra combat phase, non-legendary creatures you control can activate Boast abilities an additional time.