Savageborn Hydra [Double Masters] Metal [-20] Negative Energy Cone — Whenever

Negative Energy Cone — Whenever an attacking creature you control or a blocking creature an opponent controls dies

(It's an artifact with "{T}

When Lithoform Blight enters the battlefield

{T}: When you next activate an ability that isn't a mana ability this turn by spending four or more mana to activate it

You may have Sakashima's Protege enter the battlefield as a copy of any permanent that entered the battlefield this turn

Savageborn Hydra [Double Masters] Metal [-20] Negative Energy Cone — WheneverSet: Double Masters Type: Creature Hydra Rarity: Rare Cost: {X}{R}{G} Double strike Savageborn Hydra enters the battlefield with X +1 +1 counters on it. {1}{R G}: Put a +1 +1 counter on Savageborn Hydra. Activate only as a sorcery.