Lets be doubly serious here: this is a nifty tool for some mono-red Commander decks to supplement Angraths Marauders and the like, but its not a $30 card on power alone
Green is already a very strong color for ramps, and this color doesn't need this elf's mana creating potential
Once their defense is depleted, they pop, go back to you, and get recast as their transformed backside for a second big bonus
Tinker doesnt even need a second card to be absurd, although frequently it was combined with Time Walk to great effect since all you need to do is untap
3) The powerful colorless matters cards are clunky but powerful, like Kozilek, the Great Distortion, and the decks that cast them are activating Blighted Woodland or casting Explosive Vegetation to find Wastes