Its certainly plausible. dirtygymsock, via r/MTGRumors Past Precedent Another facet of the Star Trek x MTG leak that lends it credence is the fact that weve seen this happen before
Thanks to an effect that gives it a 500-attack boost for every Tuner in your Graveyard, this Dragon will usually arrive with at least 5,500 attack points
For reference, heres what recent sets guarantee per box: VSTAR Universe : 1 SAR + 1 SR Energy + 3 AR + 1 K-Radiant Terastal Fest ex : 1 SAR + 1 ACE SPEC + 3 Reverse Holo + 9 RR MEGA Dream ex : 1 MA + 1 SR + 1 Item SR + 3 AR These arent probabilities theyre guarantees
Because this is such a commander-focused Bria deck, Ive got a specific answer for that
MTG Hexproof history The effect of MTG's Hexproof keyword first appeared on a couple of cards in 1999's Portal Three Kingdoms set
Shogunsaga exists, so you definitely can