A threaten effect every turn isnt something I remember seeing a lot of, so you could probably build a pretty unique deck around it
Its rare that Red decks get draw like this, especially when its also mana advantage, and doesnt use the exile zone like impulsive draw
These type-shifted cards included a Dark-type Charizard ex and an Electric-type Tyranitar ex
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Legal Oathbreaker Legal Penny Not Legal Toolbox Notes and Rules Information for Arcane Signet: If you have two commanders, the ability adds one mana of any color in their combined color identities
The deck features an ENORMOUS number of land destruction effects including spells that can wipe out all lands (Armageddon, Boom // Bust, Wildfire, Catastrophe, Obliterate, Decree of Annihilation, and many more) as well as a number of targeted land removal spells
A 13/13 Lizard Horror with trample is likely large enough of a creature to end most games in a couple of swings, even if you happen to be playing Commander