Mana Flare [Collectors' Edition] Arena League 2005 you may change Eldrazi Mimic's

you may change Eldrazi Mimic's base power and toughness to that creature's power and toughness until end of turn

Set: Unlimited Edition Type: Enchantment — Aura Rarity: Uncommon Cost: {2}{U}{U} Enchant creature

Set: Beta Edition Type: Sorcery Rarity: Rare Cost: {2}{W}{W} Destroy all creatures

but if it switches it won't be able to switch back

{R}: Granite Gargoyle gets +0/+1 until end of turn

Mana Flare [Collectors' Edition] Arena League 2005 you may change Eldrazi Mimic'sSet: Collectors' Edition Type: Enchantment Rarity: Rare Cost: {2}{R} Whenever a player taps a land for mana, that player adds one mana of any type that land produced.