Skyscraper 3 - Megatropolis

[Kingdom Xathers]

All non-Fusion "HERO" monsters gain 500 ATK and DEF. You can Fusion Summon "HERO" monsters without "Polymerization" or "Dark Fusion" (An "Evil HERO" Fusion Monster Summoned this way is treated as Fusion Summoned by "Dark Fusion"). You can only use this effect of "Skyscraper 3 - Megatropolis" up to 3 times per turn. If this card is sent from the field to the Graveyard, while you control no monsters Summoned from the Extra Deck: You can Special Summon 1 "HERO" Fusion Monster from your Graveyard, ignoring its Summoning conditions. You can only use this effect of "Skyscraper 3 - Megatropolis" once per turn.

[Dragonmagic342]

Incredibly broken. Once per turn for all of the card's effects is enough.

[newhat]

You'll still take minuses to Fusion Summon. You can play your way into card advantage with Absolute Zero but it's not inherent to the card. This would form an engine with Elemental HERO Shadow Mist to be sure.

 

There's probably some obscure OTK with Vision HERO Trinity but it's expensive and hard to set up.

[Zeppeli Gyro Supreme]

"3 times per turn" is pretty much never a restriction, unless it's something specific like Berserker Soul's 8 times, which has a reason.