Warmaster Arialis III

Double strike, menace, haste.
At the end of each combat phase, if Warmaster Arialis III attacked and one or more attacking creatures you control died during that combat
phase, untap all creatures you control. After this
phase, there is an additional combat phase.
"Victory justifies all ends. Trovia will rule over Vryn,
or the ruin left in the wake of this war, but it rule it
shall."