Plus, in a deck filled with creatures that get +1/+1 counters, extra counters arent bad at all
This way, you can get the best price for the cards and get rid of several cards at once
Atog deck: 25 Cards known to exist, to be completed with the missing ones: Counterspell (7th Edition) Entomb (Odyssey) Fact or Fiction (Invasion) Fire / Ice (Apocalypse) Flametongue Kavu (Planeshift) Island 332/350 (7th Edition) Island 333/350 (7th Edition) Island 334/350 (7th Edition) Island 336/350 (Invasion) Island 337/350 (Invasion) Island 338/350 (Invasion) Island 335/350 (Onslaught) Island 337/350 (Onslaught) Island 338/350 (Onslaught) Nightscape Familiar (Planeshift) Psychatog (Odyssey) Repulse (Invasion) Salt Marsh (Invasion) Shadowmage Infiltrator (Odyssey) Shivan Reef (Apocalypse) Syncopate (Odyssey) Underground River (7th Edition) Undermine (Invasion) Urborg Volcano (Invasion) Urza's Rage (Invasion) Mini MTG Cards Angry Dog Deck Uncut Sheet 10 x 11 front
All counters, Auras, effects, and so on are removed when it is exiled
Those alone add significant electricity to your Spirit deck
For the cost and ease of access, both Archazias Island single-player decks make a decent jumping-on point for newer players