Originally Posted by
keys
Merfolk, probably more than any other deck, will try to keep you off green so you can't play Goyf. They'll stifle your fetches and waste the Taigas you draw (if you play them for Nacatl). They often keep hands without colored mana if they have a Vial. Having your Apes and Cats shrink is collateral damage.
Also, you can still play spells and activate abilities (i.e. pump Figure) after blocks are assigned with post-M10 rules. I realize Figure requires a greater mana investment, but I think it's perfectly manageable.