Loyal Retainers (Invocation) [Amonkhet Invocations] San Diego Comic-Con 2014 you can negate the activation

you can negate the activation of 1 Spell Card and destroy the Spell Card by discarding 1 card from your hand

Set: Sun & Moon: Lost Thunder Type: Water Rarity: Ultra Rare Retreat cost: Colorless

if a "Sinister Serpent" is in your Graveyard

When this card inflicts battle damage to your opponent: You can target 1 face-up monster your opponent controls

Loyal Retainers (Invocation) [Amonkhet Invocations] San Diego Comic-Con 2014 you can negate the activationSet: Amonkhet Invocations Type: Creature Human Advisor Rarity: Mythic Cost: {2}{W} Sacrifice Loyal Retainers: Return target legendary creature card from your graveyard to the battlefield. Activate this ability only during your turn, before attackers are declared.