While there are other strong options like Krenko, Mob Boss for generating tokens or Chandra, Torch of Defiance for card advantage, the Fuseling's ability to grow larger with each oil counter can create a formidable threat in the right build
Making creature tokens isn't a bad effect, but the mana generation provided by treasure is much better for chaining together spells
Its a 3/2 for four that can either blow up a creature or planeswalker, counter a spell, activated ability, or triggered ability
(It's an artifact with " , Sacrifice this token: Add one mana of any color.") Enchantment Color tag templates(None) Sphere of Safety Creatures can't attack you or planeswalkers you control unless their controller pays for each of those creatures, where X is the number of enchantments you control
Attack, die, rebuild, and outlast is your approach, bringing back the living machines over and over to out-grind your opponent