Enlightened Tutor

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Urza's Incubator

As Urza's Incubator enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.

Clay Champion

Clay Champion enters with three +1/+1 counters on it for each {G}{G} spent to cast it.
When Clay Champion enters, choose up to two other target creatures you control. For each {W}{W} spent to cast Clay Champion, put a +1/+1 counter on each of them.

Gamble

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Maze of Ith

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Entomb

Search your library for a card, put that card into your graveyard, then shuffle.