He comes in indestructible and his ability automatically triggers at end step, so this feels sort of like an Etali where you pay one mana more to guarantee at least one trigger while also draining your opponents for a bunch of life
As for the seasonal promo card, it's Dash's sister, Violet Parr, Learning New Tricks, and again, it's a similar card in that it's foil with a different rarity icon rather than a brand-new design
You obviously cant play all 8s or anything, but beware of dragging out games if you dont have them
Even if you put a lot of mana into this, the odds of getting more than two or three cards out of it, let alone the four youd need to get your mana back
11 Urza's Rage Many matches have been won by the playing of this card