Grand Poobah-Time Slayer

When a creature enters the battlefield, untap
Grand Poobah-Time Slayer.
Indestructible
{2}{b}{t}: Each player discards all of the cards in
his or her hand, then draws that many cards
minus 1.
{1}{b}{r}: Target creature gets -3/-3.
{2}{g/w}: Destroy target artifact or enchantment.
{4}: Scry 1, if it's a land card put it on the battlefield tapped. If not, draw a card.