There are around 170 Black and Red cards, include split, hybrid, aftermath, and gold cards, but not cards with a Black and Red color identity, such as Soul Burn
Artifact (7)
From a speculative standpoint: cards that synergize with Thanoss artifact-based plan and color identity will see demand spikes as the Commander community builds around him
In addition to a strong tempo plan, Jeskai Murktide can pivot to a Blood Moon plan after game one, should the match-up call for it, adding a powerful angle of attack against greedy opponents
It cant be countered or responded to, and you can activate it while casting a spell
Arcades, the Strategist ( PF, C, ETB ) - Noteworthy interaction with Nesting Dragon, but otherwise this isn't the shell for this - just not enough defenders