Mental Link

Enchant creature
When Mental link enters the battlefield, if you
cast it, create a token copy of it attached to another target creature you control.
Enchanted creature has the abilities of each other creature you control with an enchantment called Mental Link attached to it and gets +X/+Y where
X and Y are the total power and toughness of those creatures, respectively.
If enchanted creature leaves the battlefield, sacrifice
each other creature you control with an enchantment called mental link a