Champion's Helm [Fallout] Demon Cleric Set: Dragon's Maze Type: Sorcery

Set: Dragon's Maze Type: Sorcery Rarity: Rare Cost: {U} Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn

Set: Modern Masters Type: Land Rarity: Rare At the beginning of the end step

There can be no better allies

Set: Zendikar Type: Creature — Dragon Rarity: Rare Cost: {4}{R}{R} Flying

It also features a number of creatures that have an effect on entering play

Champion's Helm [Fallout] Demon Cleric Set: Dragon's Maze Type: SorcerySet: Fallout Type: Artifact Equipment Rarity: Rare Cost: {3} Equipped creature gets +2 +2. As long as equipped creature is legendary, it has hexproof. (It can't be the target of spells or abilities your opponents control.) Equip 1