Dinrova Horror

When this creature enters, return target permanent to its owner's hand, then that player discards a card.

Plains

Urza's Tower

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

Venser, Shaper Savant

Flash (You may cast this spell any time you could cast an instant.)
When Venser enters, return target spell or permanent to its owner's hand.

Possessed Skaab

When this creature enters, return target instant, sorcery, or creature card from your graveyard to your hand.
If this creature would die, exile it instead.

Mulldrifter

Flying
When this creature enters, draw two cards.
Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Ghostly Flicker

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Mystical Teachings

Search your library for an instant card or a card with flash, reveal it, put it into your hand, then shuffle.
Flashback {5}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Crystal Grotto

When this land enters, scry 1.
{T}: Add {C}.
{1}, {T}: Add one mana of any color.

Energy Refractor

When this artifact enters, draw a card.
{2}: Add one mana of any color.

Unwind

Counter target noncreature spell. Untap up to three lands.

Swamp

Ephemerate

Exile target creature you control, then return it to the battlefield under its owner's control.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Prevent all combat damage that would be dealt this turn.

Urza's Mine

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Spell Burst

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell with mana value X.

Urza's Power Plant

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

Island

Impulse

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Pulse of Murasa

Return target creature or land card from a graveyard to its owner's hand. You gain 6 life.

Prophetic Prism

When this artifact enters, draw a card.
{1}, {T}: Add one mana of any color.

Stonehorn Dignitary

When this creature enters, target opponent skips their next combat phase.

Sylvan Scrying

Search your library for a land card, reveal it, put it into your hand, then shuffle.