Endure is a keyword action thats used to shorten text that would read place N +1/+1 counters on this creature or create an N/N white Spirit creature token. Endure is sometimes a triggered ability, but it can also be part of an activated ability, like on Krumar Initiate
It doesn't matter why the last time counter was removed or what effect removed it
While you technically only need two of each card - as only two of each card can be within a deck and the same cards can be used across multiple decks - you may want to save them up for different Flairs
Fueling a recent Legacy Challenge win, Faerie Mastermind keeps up the pressure while providing fuel in this incredibly fast format
When cards like Accumulated Knowledge and Intuition come cheap, lots of cards get drawn and soon after that games tend to end quickly
Agents Alquist Proft, Kaya, and Kellan are on the job