In the pre-board games I would say Auras is clearly favored, but post-board Gruul gets more cheap removal in the form of Rending Volley, making things much closer
Dont ask me if this is a great, high-performing deck in Modern
Ocelot Pride is the most powerful version of this, but its also far more expensive if you dont pull it yourself from Modern Horizons 3 boosters
You get a powerful, cheap, on-curve threat, who also gets you the goods either then, or later on
I think Teleporation Circle may be a bit trickier to reprint, but targeting cards like Portal rather than very specific cards like Dream Chisel is the way to speculate these days
Your opponent will be able to turn the 2/2 face up for its regular costs, but ONLY if its a creature