You may have Sakashima the Impostor enter as a copy of any creature on the battlefield, except its name is Sakashima the Impostor, it's legendary in addition to its other types, and it has ": Return Sakashima the Impostor to its owner's hand at the beginning of the next end step."

Haste
: Create a token that's a copy of target nonlegendary creature you control, except it has haste. Sacrifice it at the beginning of the next end step.

+1: Return up to one target land card from your graveyard to your hand.
−1: Wrenn and Six deals 1 damage to any target.
−7: You get an emblem with "Instant and sorcery cards in your graveyard have retrace." (You may cast instant and sorcery cards from your graveyard by discarding a land card in addition to paying their other costs.)

Counter target spell. At the beginning of your next main phase, add an amount of equal to that spell's mana value.

: Add .
, Sacrifice this land: Destroy target land.

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.
Counter target spell.

Enchant land
At the beginning of the upkeep of enchanted land's controller, this Aura deals 1 damage to that player.

Enchant Wall
Enchanted Wall can attack as though it didn't have defender.

, : Put a charge counter on this artifact.
, Remove three charge counters from this artifact: Take an extra turn after this one.

Vigilance; horsemanship (This creature can't be blocked except by creatures with horsemanship.)

Return target permanent to its owner's hand.

You may reveal a sorcery card you own from outside the game and put it into your hand. Exile Burning Wish.

Whenever a permanent you control enters tapped, untap it.

, : Add .

, : Return target artifact card from your graveyard to your hand.

As this land enters, choose a creature type.
: Add .
: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

When this creature leaves the battlefield, draw a card, then you may put a permanent card with mana value less than or equal to the number of lands you control from your hand onto the battlefield tapped.
Warp (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)

If an opponent who controls at least as many lands as you do would put a land onto the battlefield, that player instead puts that land onto the battlefield then sacrifices a land of their choice.