Ionization Star-vader, Hafnium

[ACT](VC): Legion20000 "Unrivaled Star-vader, Radon" (If your opponent's vanguard is grade 3 or greater, this unit may return four cards from your drop zone into your deck once, search your deck for the specified card, and Legion) [AUTO](VC):When this unit attacks a vanguard, if this unit is Legion, choose units equal to the number of your opponent's locked cards from among your units, and those units get [Power]+5000 until end of turn. [ACT](VC):[Counter Blast (2)] Choose one of your opponent's rear-guards in the back row, and lock it. (The locked card is turned face down, and cannot do anything. It turns face up at the end of the owner's turn.)