For those unfamiliar, the term aggro is short for aggressive, and in this case, refers to a strategy that seeks to put lots of low-cost cards into play and gain enough of an advantage to win before the opponent can stabilize
TLDR If youre wondering how to make custom Magic cards, start by searching an existing card and letting the builder auto-fill the boring parts
The important combo here is getting Yavimaya, Cradle of Growth onto the battlefield, as this makes every land in play a Forest in addition to its other types
The Quick Shot action is also useful, dealing 1 damage to a character and allowing you to draw a card, and Thumber then gives a chosen character +3 strength on your turn
She has a monocle on one eye, holding up an item to it while she inspects it closely
Lotus Scan needs no white background, while ManaBox requires one for reliable results