I don't mind these kind of 'Constructs' and 'Golems' in fantasy settings if they're shown to be at least a couple of distance removed from our current level of technology, y'know
That is great in Rakdos with Cabal Coffers and Urborg, Tomb of Yawgmoth or with Gruul's ramp like Cultivate and Rampant Growth and Explosive Vegetation to reliably get to that 8 mana
Assuming youre going out of your way to cast a lot of those spells, or even if youre just running a few bits of interaction and some card draw spells, youll have a lot of flying Creatures very quickly
Field Of Dreams While some other cards on this list have similar cards that exist for cheaper, this is, flat-out, the only example of a card that is simultaneously expensive while also having an identical effect to a cheaper card
However, if you already have great cards in your hand, Garruk's -3 can be used to instantly put a creature from your hand onto the battlefield, subverting even the highest of mana costs