Its ability easily combines with several other cards to strip opponents hands, and keep them empty
It scores your deck across four axes Power, Salt, Fear, and Airtime detects two- and three-card infinite combos, evaluates your mana base and color identity, and rolls everything up into a power rating and a Commander bracket (15)
Exiling a key card from an opponents graveyard before they can use flashback or stopping recursion feels good, and you get to explore on top of it
There were a lot of large-scale Battles in the lore, which would make this card type a good flavor win
If more than one creature with toxic deals combat damage to a player at the same time, those counters are placed as a single event, and the ability triggers one time
When you spend this mana to cast an instant or sorcery spell with mana value 3 or less, you may exile that spell instead of putting it into its owners graveyard as it resolves