If you take battle or effect damage while this card is in your GY: You can place this card from your GY in your Spell & Trap Zone as a face-up Continuous Trap. During the Main Phase, if this card is treated as a Continuous Trap: You can Tribute 1 "HERO" monster; Special Summon this card. If this card is Special Summoned from the Spell & Trap Zone: You can Special Summon 1 Level 4 or lower "Vision HERO" monster from your Deck. You can only use each effect of "Vision HERO Increase" once per turn.
Vision HERO Increase’s unique ability is it can search and Special Summon a Vision HERO from your deck. Use this to Special Summon Vision HERO Vyon which can search Polymerization and combo into Fusion monster.
Instead of using Vision HERO Increase’s own effect to move him from the Spell/Trap zone, you can use support like Vision HERO Gravitio or Vision Release. Vision Fusion lets you use Vision HERO Increase in your Spell Trap Zone as fusion material.