Ionization Star-vader, Hafnium (R)

[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 one of your separate units for each of your opponent's locked cards, 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.)