Darksteel Sentinel [Scars of Mirrodin] Pauper But the mysterious thing is

But the mysterious thing is that its memory i

negate the activation and the effect of the card and destroy it

The Tribute Summoned monster must be face-up on the field to activate and to resolve this effect

Set: Magic Origins Prerelease Promos Type: Creature — Human Knight Rarity: Rare Cost: {W}{W} First strike

Set: Chaos Impact Card type: Effect Monster Rarity: Secret Rare Attack: 1800 Defense: 0 You can send any number of Dragon monsters from your hand and/or face-up field to the GY

Darksteel Sentinel [Scars of Mirrodin] Pauper But the mysterious thing isSet: Scars of Mirrodin Type: Artifact Creature Golem Rarity: Uncommon Cost: {6} Flash (You may cast this spell any time you could cast an instant.) Vigilance Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)