Sword Instrutor Of The Six Samurai

Here is one of my yugioh card Ideas. Here's the stats:

Sword Instructor of the Six Samurai
Level 4
Fire
Warrior/Tuner
Atk1800/1300
This card can only be used as Synchro Material for a Six Samurai or Shien effect Synchro monster. If this card is sent to the graveyard for the synchro summon of a Six Samurai synchro monster, that monster gains 1000 atk during damage step when it attacks an opponents monster with higher atk until the end phase.