Spell / Normal
Effect :
Pay 1000 LP; Special Summon 1 Level 5 or lower Fusion Monster from your Extra Deck, but it cannot attack, also it is destroyed during the End Phase. (This is treated as a Fusion Summon.) You can only activate 1 "Instant Fusion" per turn.
Ratios : 1
Spell / Normal
Effect :
Pay 1000 LP; Special Summon 1 Level 6 or lower non-Effect Fusion Monster from your Extra Deck, but it cannot attack, also destroy it during the End Phase. (This is treated as a Fusion Summon.) You can only activate 1 "Ready Fusion" per turn.
Ratios : 2 - 3 (Recommended at 3)
Level 6 WATER / Aqua / Fusion / ATK 2100 / DEF 1800
"Mystic Lamp" + "Hyosube"
Ratio : 0 - 1 (Optional)
Used for : Better acesss to level 8 synchro
Level 5 WATER / Zombie / Fusion / Tuner / ATK 2200 / DEF 1800
"2 Tuners"
Ratio : 0 - 1 (Optional)
Used for : Extension if Mermaid Shark get interrupted (usually used in White Aura Engine)
Level 5 WATER / Fish / Fusion / ATK 2100 / DEF 1300
"Sea Kamen" + "Gruesome Goo" + "Amazon of the Seas"
Ratio : 0 - 1 (Optional)
Used for : Extension if Earthbound engine get interrupted
Level 4 WATER / Fish / Fusion / ATK 1500 / DEF 1200
"Fusionist" + "Enchanting Mermaid"
Ratio : 1
Used for : Generic Level 4 extender
Level 2 DARK / ELFE / Fusion / Tuner / ATK 0 / DEF 2100
"2 Normal Monster"
Ratio : 0 - 1 (recommended at 1)
Used for : Generic Level 2 Tuner extender
The fusion engine is kind of half engine half extender. It get the deck going by giving you free bodies, you can run as much as you want (but most people run at least 2 targets). Notable advantage is that Instant/Ready fusion can't be hit by common handtraps making it relatively safe to use.
Impact :
Field Presence : Easely available bodies
Good Synergy : Rare Fish is a WATER Fish meaning it can be used as fuel for other ghotis
Under 5 Summons : This engine cannot be hitted by Nibiru
Extra Space : Less extra deck slot means less coverage
Use the spell card and Special Summon whatever you need, can't get any simplier
If you draw both fusion spell you can get 1 Synchro from your Extra for free (2000 LP actually)
Never forget that only Ready Fusion can summon Roaring Snake