Just a cursory glance at the sets spoiler shows an astounding number of cards that Coalition Honor Guard makes look very foolish, and with its high toughness and easy-to-manage cost it is fairly easy to get in play and keep in play
You may put a nonland permanent card with mana value X or less from among them onto the battlefield under your control
The main strategy revolves around unleashing relentless, recursive threats that slowly grind down opponents while maintaining board control
This pairs excellently with Mahadi, Emporium Master, who produces a Treasure on your end step for each creature that died that turn, and with Prosper, Tome-Bound, who generates Treasures from impulse-drawn cards
Bigfin Bouncer is another stellar blue common creature
Selesnya decks are often great until your opening hand has three Lands and somehow none of them can help you cast your spells on time