Arena, Siren Queen

Swampwalk, Trample, Reach
{t}: Creatures with Hivemind have
protection from white until end of turn.
Whenever Arena, Siren Queen attacks,
each player reveals the top card of his or her
library. Choose a card and put it into your hand.
Discard the other cards revealed this way.
"I will never bow to the cult,
but their God shall guide me."