Theft of Dreams

Draw a card for each tapped creature target opponent controls.

Thing from the Deep

Whenever this creature attacks, sacrifice it unless you sacrifice an Island.

Tap up to three target creatures without flying.

Put target creature on top of its owner's library.

Target opponent reveals their hand. You draw a card for each Forest and green card in it.

Cast this spell only during the declare attackers step and only if you've been attacked this step.
Destroy target nonblack attacking creature.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Whenever this creature attacks, it gets +2/+0 until end of turn.