Counterbalance (Invocation) [Amonkhet Invocations] Dark Ascension Promos you'd need the energy of

you'd need the energy of the giant's tonic

"I'm too modest a wizard to reveal the full extent of my abilities

exile target green or white creature an opponent controls

Set: Urza's Saga Type: Artifact Creature — Construct Rarity: Uncommon Cost: {3} When Cathodion dies

Historic spells you cast cost {1} less to cast

Counterbalance (Invocation) [Amonkhet Invocations] Dark Ascension Promos you'd need the energy ofSet: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {U}{U} Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.