By Force

Wildest Dreams

Return X target cards from your graveyard to your hand. Exile Wildest Dreams.

Rosheen Meanderer

{T}: Add {C}{C}{C}{C}. Spend this mana only on costs that contain {X}.

Unbound Flourishing

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.

Magus of the Candelabra

Release the Gremlins

Destroy X target artifacts. Create X 2/2 red Gremlin creature tokens.