If you were to cast 2 Corpse Jack Menaces would you double the double? Eg: Forced Adaptation: During your upkeep enchanted creature gains a +1/+1 counter, Corpse Jack would make it 2 +1/+1 counters so would a 2nd Corpse Jack make it 4 +1/+1s?
Correct, effects like Doubling Season and Corpsejack Menace doubles the doubling













