The fact that it gains the basic land type you choose is massive, too, since it turns on synergies with cards like Utopia Sprawl, Verges, Checklands, etc
The magnetic system makes it easy to replace or remove cards
Quite a haul for red card draw
Otherwise, step on the gas, stop their life gain and go for the win because 4 damage is a lot and the loss can sneak up on players that are not keen on calculating your pump spells and burn
It still doesnt have a real board presence, so it isnt nearly as good as a creature who can loot for you Like most of the d20 cards, this thing is pretty wacky
Lastly, his Metal Scissors attack does 30 + 20 for each M Energy attached to him, though I find it pretty useless to attach more than two or three most of the time