These include Drake Hatcher (vigilance, prowess, creature tokens), Archmage of Runes (makes spells cheaper, draw), Mischievous Mystic (creature tokens), Clinquant Skymage (+1/+1 counters), and Micromancer (fetches a spell)
Putting subtle pressure on your opponents blocks (i.e., you can threaten to trade up your Malboro into Balamb T-Rexaur thanks to Paladin's Arms)
If the game is already limiting players to like-for-like swaps, the trading pool will already be severely limited
Despite their slightly-larger-than-average size, they feel very nice while shuffling, other than the fact that the sleeve edges tend to get caught on each other more than I would like
If the "intervening if" clause of Suppressor Skyguard's last ability is no longer met when the ability tries to resolve, it won't resolve and none of its effects will happen