Hetracia, Pinnacle of Hope

Whenever one or more creatures you control
attack, you gain X life, where X is the number of attacking creatures. If you gain 10 or more life
this way, put a creature from your graveyard
onto the battlefield tapped and attacking.
{t}: Return a land card from your graveyard your
hand. You may play an additional land this turn
or untap any target land. Activate this ability only
if you have at least 20 or more life than your
starting life total.