You can use each effect among the 1)st and 2)nd effects with this cards name only once per turn.
(1) Tribute 1 Synchro Monster; Special Summon from your hand 1 “/Assault Mode” monster whose name includes the Tributed monster’s. (This is treated as a Special Summon with “Assault Mode Activate”.)
(2) During your Main Phase: You can banish this card from your GY; Set 1 “Assault Mode Activate” from your hand or Deck, and if you do, it can be activated this turn.