Colorless Eldrazi spells you cast cost less to cast.
, : Search your library for a colorless creature card, reveal it, put it into your hand, then shuffle.

Search your library for a creature card, reveal it, then shuffle and put that card on top.

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

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

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

Other enchantments you control have shroud. (They can't be the targets of spells or abilities.)
, Sacrifice this enchantment: Search your library for an enchantment card, reveal it, then shuffle and put that card on top.

Reveal a card from your hand. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.
Hellbent — If you have no cards in hand, instead search your library for a card, put it into your hand, then shuffle.

When this creature enters, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.

( can be paid with either or 2 life.)
, , Sacrifice a creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.

When this creature dies, you may exile it. If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle.