Accel Synchron (LED6-EN028) - Legendary Duelists: Magical Hero 1st Edition

1 Tuner + 1 or more non-Tuner monsters
Once per turn: You can send 1 "Synchron" monster from your Deck to the Graveyard, then activate 1 of these effects;
• Increase this card's Level by the Level of the sent monster.
• Reduce this card's Level by the Level of the sent monster. During your opponent's Main Phase, you can: Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using Materials including this card you control (this is a Quick Effect). You can only Synchro Summon "Accel Synchron(s)" once per turn.