Batterskull echoes

Whenever a creature enters, you may add an amount of equal to the number of creatures you control that share a creature type with it.

Black creatures get +1/+1.

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +0/+1 and has "Sacrifice this creature: This creature deals 1 damage to any target." Equip

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +4/+4 and has vigilance and lifelink. : Return this Equipment to its owner's hand. Equip

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +2/+2. Equip

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +1/+1. Equip