Metalborg, Blackboi (BT17/042EN) [Blazing Perdition ver.E]

[AUTO]:Forerunner (When a unit of the same clan rides this unit, you may call this unit to (RC)) [ACT](RC):[Counter Blast (2) & Choose four of your rear-guards with "Metalborg" in its card name, and put them into your soul] Search your deck for up to one grade 3 card that may perform Legion with a grade 2 unit in your (VC), ride it as [Stand], shuffle your deck, choose one unit that may perform Legion with your vanguard from your soul, and perform Legion.