synchro - assault mode activate

if i have a synchro monster on the field (like "stardust dragon")and "assault mode activate" face down on the field too, and i have his assault mode in my hand ("stardust dragon/assault mode") but no more "stardust dragon/assault mode" in my deck, can i use "assault mode activate"?
the trap is:
Tribute 1 Synchro Monster. Special Summon 1 "/Assault Mode" monster whose name includes the Tributed monster's name from your Deck in Attack Position.

No. As it says in the card text. The Special Summon must come from the deck. If you were allowed to Special Summon from your hand it would say so.

They changed the name from Buster mode to Assault mode?

Dark Master wrote:

They changed the name from Buster mode to Assault mode?

i guess they did
thats what they wrote in DMU.
anyway, you can lock, i got the answer