Soul Severing Demonic Spear Knight, Zagan

[AUTO]:When this unit is placed on (RC) during your main phase, you may [Soul-Charge 1]. Choose up to one grade 4 card from your hand, and reveal it. If you revealed a card, or you have a grade 4 or greater vanguard with "Drajeweled" in its card name, choose up to one card from your soul with a different card name from this unit and grade less than or equal to your vanguard, and call it to (RC). At the end of that turn, put that called unit into soul. [CONT](RC):If you have a vanguard with "Drajeweled" in its card name, this unit gets "Boost".