Gau, Feral Youth of the Veldt

Flash
When Gau, Feral Youth of the Veldt enters the
battlefield, exile a creature from an opponent's graveyard. As long as that creature is in exile,
Gau has first strike if it has first strike. The same
is true for flying, deathtouch, double strike,
haste, lifelink, menace, reach, trample, and
vigilance.
{4}: Return Gau to its owner's hand. Any
opponent may active this ability at any time
they could cast a sorcery.