Sleight of Mind [Unlimited Edition] Nightmare Horse remove both of them from

remove both of them from combat

if it has a +1/+1 counter on it

sacrifice Helm of Obedience and put one of them onto the battlefield under your control

Set: Legends Type: Creature — Elemental Rarity: Rare Cost: {2}{U} When Time Elemental attacks or blocks

Set: Nemesis Type: Creature — Human Rebel Rarity: Rare Cost: {2}{G}{G} {3}

Sleight of Mind [Unlimited Edition] Nightmare Horse remove both of them fromSet: Unlimited Edition Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)