That said, its a remarkably powerful card in a Kindred deck, and I would expect this to have a jump when Allies are a big thing again
The Robot part kind of matters, gives control the ability to take over if it comes down to a topdeck war
UnStable s legendary creatures all have this very careful, sober feel to their card design, which in hindsight seems as though Wizards was trying to get them Rule Zerod into casual Commander without actually making them black border
This card can attach an extra green Energy to it every turn, and even draw a card to replace the Energy attached
And if toughness is your goal, you need some of the highest-toughness cards out there like Unhallowed Phalanx, Charix, the Raging Isle, and Kharis & the Beholder (that last one not being legal for tournament play)