The Countering Runner [Mystery Booster 2 Playtest Cards] 118 This effect doesn't remove Auras

This effect doesn't remove Auras already attached to those artifacts

players place their offering markers on the spirit cards or on altars for the Great Tree

or cards that trigger a powerful effect

and the forest was rising

put those cards on the bottom of your library in any order

The Countering Runner [Mystery Booster 2 Playtest Cards] 118 This effect doesn't remove AurasSet: Mystery Booster 2 Playtest Cards Type: Legendary Creature Merfolk Gamer Rarity: Rare Cost: {3}{U}{U} Spells you cast that would counter a spell cost {U}{U} less to cast. Whenever a spell an opponent controls is countered by a spell or ability you control, draw a card. The Countering Runner deals 2 psychic damage to that player. (Psychic damage doesn't cause loss of life, but a player who's been dealt 20 psychic damage loses the game.) Ready to