I'd reword it as
All your non-skeletal creatures turn into skeletons and all your skeletons reanimate. Drains
per turn.
though non-skeletal sounds wierd...
essentially, I think this shouldn't trigger death effects, why?
Imagine Boneyard
turn 1: I start with 1 creature and boneyard +this
dies and turns into skele => boneyard => two skeles
turn 2: skeles reanimate
turn 3: 2 creatures die => boneyard +2 skeles => 4 skeles
turn 4: 4 reanimated creatures(note i didn'y ay quanta other than upkeep to have 3 free creatures)
turn 5: 4 creatures die => boneyard +4 skeles => 8 skeles
turn 6: 8 skeles reanimate
by turn 6, I've paid 12
to have 8 creatures all of which have a chance to be deadly; turn 8 16
for 16 creatures
Essentially(though theorhetical) if I can keep this combo up for 8 turns, I'll have paid out 16
for 16 creatures that can range anywhere from a tiny photon to a big arse dragon
this doesnt even include bonewall. Vulture is negligent because it dies anyways.