I'll give you a hand, while it benefits the both of us.
Trigger:
Stand
[ACT](RC) Generation Break 1 Darkness (This ability is active if cards have been put into your soul during this turn) :[Put this unit into your soul] If you have a grade 4 vanguard, draw a card, choose one of your rear-guards, and that unit gets [Power]+3000 until end of turn.