According to TCGPlayer, based on 5,000 packs, MHRs from the Mega Evolutions Pokmon set have a 1 in 1,260 chance of being pulled
Turning dead cards into action sounds like the perfect use case, though I've seen this be used in a deck that tries to go off with Phyrexian Dreadnought and Greater Good, with some Replenish action, too, hence the two-dollars-and-change price tag
It seems the effect on Alabaster Host Intercessor has become evergreen on at least one white spell in each major set where an opposing creature can be removed as long as your creature stays on the battlefield
Just over the last few months, its taken a significant jump on the secondary market with the higher end of that range looking pretty consistent over July and early August
Desynchronization An instant speed board wipe is always welcome, even one as limited as Desynchronization, which could actually whiff in an EDH game with the proliferating number of legendary creatures out there
But as our new dog-friend can attest, some cards Escape with some extra oomph