If its your commander, youre very limited in what kind of cards you can have them bouncing and bringing back, and you may have to turn to artifact sources like Urzas Tome or Smugglers Copter to start doing weird things with it like Eldrazi Conscription
Any green commander will do as long as they're smaller than a dinosaur
Every once in a while, they do appear on the market, but the opportunities are far and few between
Activate only as a sorcery.) Creature - Wizard Merfolk Evasion (CTRL to add secondary) Land Mosswort Bridge Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped
In the late game, a 2/1 menace creature just isnt likely to get through in combat
Maybe it builds-up to a limit break-style ultimate ability on some creatures