Originally Posted by
lordofthepit
I disagree. Only Tarmogoyf in your build is a better topdeck. Coatl comes down at a 2/2 blocker at the very least and will swing for 3 the very next turn, which is already as good as the Pridemage without the benefit of more draws or considering that the Coatl will continue to grow naturally. By the time you're in topdeck mode, the Coatl's :1::u::g: cost should be irrelevant, plus given that you often want to fetch basic Islands early, he isn't necessarily more difficult to cast than the Pridemage at :g::w: with two off-colors.
He's not as good a blocker as the War Monk the turn he hits, but he swings for at least 3 the very next turn and continues to grow from there. Plus your criticism of not being to afford the Coatl applies even more so with the Warmonk costing :w::u::g:.
He's a better topdeck than Nimble Mongoose. Better than Trygon Predator. Better than Vendilion Clique. Better than Noble Hierarch, which you dislike. Depending on board situation, better or worse than Sower of Temptation. Worse than Mystic Enforcer, to be sure, but that has other issues.
Earlier in the game he at least pitches to Force of Will in a pinch, an option which occasionally proves useful. You can cast him early to bait out counters or removal to cast a Tarmogoyf, or reverse the order if you have the cantrips in hand to make the Coatl bigger. You can keep him at the top of your library to fill the 3 cc niche for Counterbalance.
Consider that these are worst case scenarios, as you can easily draw into a cantrip to make the Coatl huge (he gets +2/+2 per turn at worst if a Top is active), and he can easily swing the game in topdeck mode. I wouldn't necessarily go so far as to call him an auto-include, but I have to seriously question your characterization of him as a "bad card".