Gríma, Saruman's Footman - [Foil, Extended Art] Tales of Middle-earth Commander (LTC) BNG and planeswalker spells that player

and planeswalker spells that player casts cost {2} less to cast

Then copy each card exiled with Arcane Bombardment

letter to Sensei Hisoka

"Honorable tactics are for honorable foes

This explains why the goblins remain unaffected

Gríma, Saruman's Footman - [Foil, Extended Art] Tales of Middle-earth Commander (LTC) BNG and planeswalker spells that playerGrma, Saruman's Footman can't be blocked. Whenever Grma deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order.