Comparative Analysis
58PlayableInstant
Oath of the Gatewatch
2HG Rating
58/100
Gains value in 2HG: protects a teammate.
- +8Protects a teammate
'Target player' and 'target permanent' effects can be aimed at your teammate — you can't do that in a duel.
Ratings start at a neutral 50 and are adjusted by rules derived from 2HG's structure — shared 60 life, shared turns, two opponents. They'll be recalibrated against real play rates once teams start submitting decklists.
Oracle text
Surge 
(You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Target player draws two cards.
Legality
Plays well beside it
Shares the "protects a teammate" axis — good candidates for your teammate's deck.
Suggestions are characteristic-based for now. Once teams submit pairings, this becomes a real co-occurrence score: played in X% of teams whose partner deck runs Comparative Analysis.