I remember being absolutely terrible at it, but enjoying every single moment
With 81 PSA 10 copies known in the world, this Mewtwo card is one of significant rarity, and even more value
As soon as Decimator Beetles ability resolves, state-based actions are checked, and the game sees that you have both counter types on your Servant, so one +1/+1 counter and one -1/-1 counter are removed at the same time (resulting in Servant dying)
[34] In Limited formats, a small number of cards are opened for play from booster packs or tournament packs, and generally a minimum deck size of forty cards is enforced
City on Fire, Impact Tremors, Blasphemous Act, Descent into Avernus, Repercussion, Manabarbs, that sort of thing
As such, having a creature that can block over and over again and successfully dissuade all attacks can make a tremendous difference