Energy Flux [Antiquities]

Energy Flux [Antiquities]Set: Antiquities Type: Enchantment Rarity: Uncommon Cost: {2}{U} All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {2}."

(You may pay {2}{R} and sacrifice a land in addition to any other costs as you cast this spell

−1: Target creature gets +X/+X until end of turn

Set: Modern Masters 2015 Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {15} This spell can't be countered

and as dangerous

Set: Aether Revolt Type: Artifact Rarity: Common Cost: {3} {U}

Crovax twisted heroism into its purest shadow

"As with any malevolent being

each player sacrifices a creature or planeswalker

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {2}{R} Target opponent chooses a creature they control

We can't allow that

Set: Commander 2014 Type: Sorcery Rarity: Rare Cost: {8}{R} This spell costs {1} less to cast for each creature on the battlefield

you may have it deal 3 damage to target Spirit creature