Baigujing, Skeleton Spirit

Other Skeleton's you control get +1/+1.
{1}{b}: You may cast Baigujing, Skeleton Spirit
from your graveyard.
Skeleton's you control have "{1}{b}: Regenerate
this creature. (The next time this creature would be destroyed this turn, it isn’t. Instead, tap it, remove
all damage from it, and remove it from combat.)