Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
This creature has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.): Add one mana of any color.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)When Shriekmaw enters, destroy target nonartifact, nonblack creature.Evoke (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)
Whenever equipped creature attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped.Equip (: Attach to target creature you control. Equip only as a sorcery.)
You may choose not to untap Immovable Rod during your untap step.Whenever Immovable Rod becomes untapped, venture into the dungeon., : For as long as Immovable Rod remains tapped, another target permanent loses all abilities and can't attack or block.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)When Acidic Slime enters, destroy target artifact, enchantment, or land.