Porygon (HGSS22) [HeartGold & SoulSilver: Black Star Promos] XY34 Whenever Slith Strider deals combat

Whenever Slith Strider deals combat damage to a player

then put a +1/+1 counter on that creature for each creature card in your graveyard

{T}: Add {B} for each Swamp you control

Set: Shards of Alara Type: Instant Rarity: Common Cost: {1}{W} Prevent all combat damage that would be dealt this turn

Set: Champions of Kamigawa Type: Legendary Creature — Spirit Rarity: Rare Cost: {2}{G}{G} Whenever you cast a Spirit or Arcane spell

Porygon (HGSS22) [HeartGold & SoulSilver: Black Star Promos] XY34 Whenever Slith Strider deals combatSet: HeartGold & SoulSilver: Black Star Promos Type: Colorless Rarity: Black Star Promo Retreat cost: Colorless