Sengir Vampire [Fourth Edition (Foreign Black Border)] Elf Archer the Ruiner has hexproof if

the Ruiner has hexproof if it hasn't dealt damage yet

Then you may pay {X}

sacrifice Underworld Breach

Set: Mirage Type: Artifact Rarity: Uncommon Cost: {2} Sky Diamond enters the battlefield tapped

Set: Secret Lair Drop Series Type: Legendary Creature — Human Shaman Rarity: Mythic Cost: {2}{B}{G} Whenever another creature you control dies

Sengir Vampire [Fourth Edition (Foreign Black Border)] Elf Archer the Ruiner has hexproof ifSet: Fourth Edition (Foreign Black Border) Type: Creature Vampire Rarity: Uncommon Cost: {3}{B}{B} Flying (This creature can't be blocked except by creatures with flying or reach.) Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1 +1 counter on Sengir Vampire.