The card is quite powerful as it not only allows a player to summon one monster more than the one they can summon each turn but it also allows them to summon one from the opponent's graveyard
Incapsula incident ID: 348000740021736041-69803255921382034
our castle's strength / Will laugh a siege to scorn." William Shakespeare, Macbeth Artist Dameon Willich Set 6E - Classic Sixth Edition Number 6 Language English printings (8) view 7E #5 6E #6 5E #0 4E #0 3E #0 2U #0 2E #0 1E #0 Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless
Bloodmoon Ursaluna can be seen here having a snack in a forest clearing, surrounded by other Pokemon like Munchlax and Teddiursa
However, I find it interesting that the ones that were underrated in the beginning (Fury, Solitude) are now being the most dominant while the very hyped Grief did fall short of the expectations
While there are some Commander applications with the Avatar Horror, the card is seeing the most play in Standard within Four-Color Zur and Domain Ramp, which uses Zur, Eternal Schemer to give your Overlord cards deathouch, lifelink, and hexproof