Gaseous Form

Enchant creature
Prevent all combat damage that would be dealt to and dealt by enchanted creature.

Glacial Wall

Harmattan Efreet

Flying
{1}{U}{U}: Target creature gains flying until end of turn.

Horned Turtle

Insight

Whenever an opponent casts a green spell, you draw a card.

Inspiration

Juxtapose

You and target player exchange control of the creature you each control with the greatest mana value. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for greatest, their controller chooses one of them.

Library of Lat-Nam

An opponent chooses one —
• You draw three cards at the beginning of the next turn's upkeep.
• You search your library for a card, put that card into your hand, then shuffle.

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Circle of Protection: Black

{1}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Memory Lapse

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Merfolk of the Pearl Trident

Mystical Tutor

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Phantasmal Terrain

Enchant land
As this Aura enters, choose a basic land type.
Enchanted land is the chosen type.

Classic Sixth Edition