Impending Disaster

At the beginning of your upkeep, if there are seven or more lands on the battlefield, sacrifice this enchantment and destroy all lands.

Profane Tutor

Suspend 2—{1}{B} (Rather than cast this card from your hand, pay {1}{B} and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)
Search your library for a card, put that card into your hand, then shuffle.

Prince of Thralls

Whenever a permanent an opponent controls is put into a graveyard, put that card onto the battlefield under your control unless that opponent pays 3 life.

Sylvan Tutor

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

Anarchy

Bearer of the Heavens

When this creature dies, destroy all permanents at the beginning of the next end step.

Ravages of War

Back to Nature

Worldly Tutor

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

Demon's Herald

{2}{B}, {T}, Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls, put it onto the battlefield, then shuffle.

Sensei's Divining Top

{1}: Look at the top three cards of your library, then put them back in any order.
{T}: Draw a card, then put this artifact on top of its owner's library.

Grim Tutor

Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.

Armageddon

Demonic Tutor

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

Jodah, Archmage Eternal

Flying
You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells you cast.

Vampiric Tutor

Search your library for a card, then shuffle and put that card on top. You lose 2 life.