Striking Sliver (Extended Art) [Secret Lair Drop Series] HER047 and has "Whenever a player

and has "Whenever a player casts a spell or a creature attacks

choose a number from one to nine

Set: Unknown Event Type: Creature — Phyrexian Mutant Snake Rarity: Common When Phyrexian Cytoshaper enters the battlefield

If you don't gain control of an item this way

Set: Promo Finish: Cold Foil - Golden Type: Equipment Subtype: Chest Rarity: Promo Class: Guardian Once per Turn Action - [1 Resource]: Create a Seismic Surge aura token

Striking Sliver (Extended Art) [Secret Lair Drop Series] HER047 and has "Whenever a playerSet: Secret Lair Drop Series Type: Creature Sliver Rarity: Rare Cost: {R} Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.) You're too busy recoiling in fear to realize that it's already hit you.