Unbound Flourishing [Modern Horizons] Mountain that player can't cast spells

that player can't cast spells or activate abilities and plays with their hand revealed

Counter target spell with mana value 1

Sacrifice two artifacts: Return Metalwork Colossus from your graveyard to your hand

−X: Chandra

Unbound Flourishing [Modern Horizons] Mountain that player can't cast spellsSet: Modern Horizons Type: Enchantment Rarity: Mythic Cost: {2}{G} Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X. Whenever you cast an instant or sorcery spell or activate an ability, if that spell's mana cost or that ability's activation cost contains {X}, copy that spell or ability. You may choose new targets for the copy.