忍びの釵/Sai of the Shinobi

Artifact - Equipment
Equipped creature gets +1/+1. <CR>
Whenever a creature enters the battlefield under your control, you may attach Sai of the Shinobi to it. <CR>
Equip {2}

Artifact - Equipment
Equipped creature gets +1/+1. <CR>
Whenever a creature you control enters, you may attach Sai of the Shinobi to it. <CR>
Equip {2}