It is a Fire card illustrated by Nurikabe
It also introduced numerous design changes, like arches for Stage 1 and Stage 2 Pokmon, between their name and HP
Well, for one thing it has developed into a legitimate staple in every format from Standard back to Vintage, along with seeing a decent amount of Commander play, so the demand is huge
PRECONSTRUCTED DECK TYPES Planeswalker Decks |This is a 60-card deck, centered around a Planeswalker card
You can fairly reliably cast Gweena on turn two in other formats like Pioneer or Explorer, with one mana creatures like Llanowar Elves and Elvish Mystic to help ramp up to bigger cards like Craterhoof Behemoth
However, almost every deck follows the pattern of having mostly 2- and 3-cost cards and very few cards that cost 6 mana or more