D-BT12/016 Explosives Equip Dragon, Launcharred

[AUTO]:When this card is discarded from hand for the cost of the ability of your vanguard with "Nirvana" in its card name, COST [Soul Blast (1)], and call this card to (RC).
[CONT](RC):During your turn, if you have a rear-guard in the [X-overDress] state, this unit gets "Boost".