Fell Beast's Shriek (508) [Tales of Middle-earth Commander] [Borderless]

Each opponent chooses a creature they control. Tap and go the chosen creatures. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.) Splice onto instant or sorcery {2}{U}{R} (As you cast an instant or sorcery spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)