Crawlspace

No more than two creatures can attack you each combat.

Pramikon, Sky Rampart

Flying, defender
As Pramikon, Sky Rampart enters, choose left or right.
Each player may attack only the nearest opponent in the chosen direction and planeswalkers controlled by that opponent.

Piracy

Until end of turn, you may tap lands you don't control for mana. Spend this mana only to cast spells.

Suppressor Skyguard

Flying
Whenever a player attacks you, if that player has another opponent who isn't being attacked, prevent all combat damage that would be dealt to you this combat.

Leveler

When Leveler enters, exile all cards from your library.

Ghost Vacuum

{T}: Exile target card from a graveyard.
{6}, {T}, Sacrifice Ghost Vacuum: Put each creature card exiled with Ghost Vacuum onto the battlefield under your control with a flying counter on it. Each of them is a 1/1 Spirit in addition to its other types. Activate only as a sorcery.

Fractured Identity

Exile target nonland permanent. Each player other than its controller creates a token that's a copy of it.

Nevermore

As Nevermore enters, choose a nonland card name.
Spells with the chosen name can't be cast.