The list below is very much what counter burn looked like in Mirrodin block and shows why it was not quite tier one, having to play things like Mystical Tutor and Boomerang are unpleasant, the lack of threats makes actually winning hard and stuff that resolves is a royal pain
Imperial Mask Imperial Mask is mainly playable in Archenemy and Two-Headed Giant Commander formats since the card not only gives you hexproof, but also your other teammate(s)
Losing life isnt the same as taking damage
Opposition Agent - No tutors lol
Seven of the 15 mythics in the set are worth more than the $10 MSRP of the pack they come from, and the high end is doing just fine with Jace, the Mind Sculptor, Imperial Recruiter, Ensnaring Bridge, and Chalice of the Void, but after the seven good mythics, there's a massive drop off from Animar, Soul of Elements at around $13 to Gisela, Blade of Goldnight at under $4
Almost every green deck with creatures wants to play The Great Henge in Commander