The effect of the upcoming Saikyo JUMP promo has been revealed:

Fusionic Revivern
LIGHT/Dragon
Level 1
ATK 0
DEF 0
[REQUIREMENT] Activate by sending this face-up card you control to the GY during the Main Phase in which you Fusion Summoned a monster.
[EFFECT] Draw 1 card, then, you can Special Summon 1 High Dragon Fusion Monster from your GY, then, if you Special Summoned by this effect, you can add 1 “Fusion” or “Polymerization” from your GY to your hand.

Source.