Illusionary Mask [Limited Edition Beta] Rivals of Ixalan "To a trained mind

"To a trained mind

Discard your hand

if that spell's mana cost is {3}{U}{U}

" —Volrath

where X is 1 plus the exiled creature's converted mana cost

Illusionary Mask [Limited Edition Beta] Rivals of Ixalan "To a trained mindSet: Limited Edition Beta Type: Artifact Rarity: Rare Cost: {2} {X}: You may choose a creature card in your hand whose mana cost could be paid by some amount of, or all of, the mana you spent on {X}. If you do, you may cast that card face down as a 2 2 creature spell without paying its mana cost. If the creature that spell becomes as it resolves has not been turned face up and would assign or deal damage, be dealt damage, or become tapped, instead