Cassionan, Botanical Brewer

When Cassionan enters the battlefield, you may search your library for any combination of 4 non-basic Lands or Plant creatures. You may place these cards directly onto the battlefield or directly into the graveyard. When Cassionan is assigned to block a creature, that creatur' e controller flips a coin for each attacking creature. Heads: the creature becomes tapped and does not untap during its controller's next untap phase. Tails: the creature gains +1/+1 until end of turn.