So, I fired up my card-browsing app of choice and filtered for green, and pulled up two specific mechanics - Morph, and Disguise
This can be played both defensively and offensively, either by protecting one of your permanents or to stop an opponent's combo
Itll teach you the deckbuilding basics you need and might even help you with your Commander deck
(Activate only if this creature attacked this turn and only once each turn.) Illustrated by Wero Gallo Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
You can find copies of this card for a bit cheaper but, for the most part, this is what most traditional variant Overlord of the Boilerbilges go for
You also have cost reducers like Bureau Headmaster, Cid, Freeflier Pilot, and Danitha Capashen, Paragon to ease out expensive pieces