Compulsive Research [Commander 2014] Myr Construct it produces colorless mana instead

it produces colorless mana instead of any other type

When an opponent's monster declares an attack: You can return this card to the hand

Set: Conspiracy Type: Sorcery Rarity: Uncommon Cost: {4}{G} Parley — Each player reveals the top card of their library

then each other player chooses a nonland permanent they don't control that hasn't been chosen this way

Discard this card: Search your library for a Mountain or Forest card

Compulsive Research [Commander 2014] Myr Construct it produces colorless mana insteadSet: Commander 2014 Type: Sorcery Rarity: Common Cost: {2}{U} Target player draws three cards. Then that player discards two cards unless they discard a land card. "Four parts molten bronze, yes . . . one part frozen mercury, yes, yes . . . but then what?"