With all your token calling, Jaenjin refunds part of all the costs you used.
V-BT07/021 RR 忍竜 ジャエンジン Stealth Dragon, Jaenjin
Grade 2 / Normal Unit / Dragon Empire – Nubatama – Abyss Dragon
AUTO (RC) When it attacks a vanguard, if you called two or more Grade 0 this turn, this unit gets Power+5000 until end of that battle. At the end of that battle, then COST [Put this unit into your soul], and Counter Charge 1.