Athena, The Tireless One

Flying, indestructible

{t}, Collect evidence X: Return target creature from your graveyard to the battlefield with mana value X.

Ignorabimus — Whenever two or more cards are exiled from graveyards, you may sacrifice a land. If
you do, each opponent loses life equal to half the number of cards you own in exile, rounded down. This ability triggers only once each turn.