It is very similar to Yunas ability, but its arguably more powerful as this is an enchantment so it cant be destroyed in combat, and its in play anytime a card goes anywhere, not just the graveyard
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)
1 Traditional foil card from Hail, Caesar 1 in 10 Cards appears in surge foil
Capable of being shifted for free at any time (if you have one-cost Diablo in play or a Morph like Zan includes here), Diablo grants you extra cards whenever your opponent draws
So what are these serialized cards
And when Liliana transforms, she makes a 2/2 Zombie token for free, and thats a great bonus