Skeletal Swarming - Adventures in the Forgotten Realms - 232

Enchantment

Mana Cost: {3}{B}{G}

Each Skeleton you control has trample, attacks each combat if able, and gets +X/+0, where X is the number of other Skeletons you control.
At the beginning of your end step, create a tapped 1/1 black Skeleton creature token. If a creature died this turn, create two of those tokens instead.

Rare · Adventures in the Forgotten Realms · #232 (AFR)

Illustrated by Svetlin Velinov