Ultimately, whether Baleful Beholder should see play depends on the current meta and how well it synergizes with other cards in your deck, but if its abilities align well with your strategy, it could definitely find a spot
Firebending Firebending is a keyword ability that turns your aggression into power
While we dont have more information about exactly what the event is or what you need to do to obtain this gorgeous card, we would guess that it would be some sort of Commander-themed event based on the promo choice
With both this and a reprint of Ravages of War coming to Universes Beyond: Fallout, the set is taking no prisoners in creating truly ghoulish effects worth of the wasteland
effects like those of "OP03-080 Kaku" and "OP03-093 Wanze" can activate your Leader effect just make sure to attack with your Leader first
Those cave synergy cards and the Hidden lands will be key parts of Limited, but thats about it