A worthwhile sacrifice

When this enchantment enters, sacrifice this enchantment unless you sacrifice four creatures. Tap an untapped Swamp you control: This enchantment deals 1 damage to any target.

When this creature enters, create three 0/1 black Serf creature tokens. When this creature leaves the battlefield, exile all Serf tokens.

Equipped creature gets +0/+6. Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Whenever this creature is dealt damage, you may destroy target nonland permanent.