Kormus Bell

All Swamps are 1/1 black creatures that are still lands.

Psionic Blast

Psionic Blast deals 4 damage to any target and 2 damage to you.

Hive Mind

Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for their copy.

Bubble Matrix

Prevent all damage that would be dealt to creatures.

Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to its other land types.

Radiate

Choose target instant or sorcery spell that targets only a single permanent or player. Copy that spell for each other permanent or player the spell could target. Each copy targets a different one of those permanents and players.

The Valeyard

If an opponent would face a villainous choice, they face that choice an additional time. (They can make the same or different choices.)
While voting, you may vote an additional time.