He's a guaranteed 2 lore when you play him, even if your opponent removes him immediately
Cards like Manamorphose are especially good with recursion effects
First Edition Base Set was produced in relatively limited quantities before the Pokemon Company and Wizards of the Coast fully understood the magnitude of the demand they were about to face
Hes a bit undersized at the start, but can quickly grow out of it, while removing a blocker each turn
Storm demands a deck completely built around itself, dominates the strategies of all players in the match, and has a massive reward for playing it properly
The weight of lands that only produce mana without any 'rough' activated abilities is 0 points, but if they have some kind of effect, a slightly heavier score is assigned