When Aleister the Invoker is Normal Summoned or flipped face-up, you can add 1 “Invocation” from your Deck to your hand. Invocation is a Spell Card that allows you to Fusion Summon a Fusion Monster from your Extra Deck using monsters from your hand as Fusion Material. Yes, you can even use Invocation to Summon an Elemental HERO Brave Neos. If you use Invocation to Summon an “Invoked” Fusion Monster, you can also banish monsters from your field and/or either player’s Graveyard as Fusion Material, which is the main reason why we are running Invoked Caliga. You are primarily going to use Invocation to Summon Invoked Cocytus, a Fusion Monster with 1800 ATK and 2900 DEF that cannot be destroyed or targeted by your opponent’s card effects and that can attack while in Defense Position.
If it’s Normal or Special Summoned, Keeper of Dragon Magic allows you to add 1 “Polymerization” Normal Spell Card or “Fusion” Normal Spell Card from your Deck to your hand by simply discarding 1 card. Use the Keeper’s effect to search Neos Fusion.
During your Main Phase, by revealing 1 Fusion Monster in your Extra Deck, Keeper of Dragon Magic allows you to Special Summon 1 of the Fusion Materials (whose name is specifically listed on it) from your GY, in face-down Defense Position. You can still use that face-down monster as Fusion Material.
The fact that, when you activate either of its effects, Keeper of Dragon Magic prevents you from Summoning monsters from the Extra Deck, except Fusion Monsters, for the rest of the turn does not really matter since that’s the only type of monsters we are going to Summon using Invocation and/or Neos Fusion.
Use Neos Fusion to Special Summon Elemental HERO Brave Neos from your Extra Deck by sending Elemental HERO Neos and a Level 4 or lower Effect Monster (ideally Bacon Saver or Flip Flop Frog) from your hand, field or Deck to the Graveyard. After this card resolves, you cannot Special Summon monsters for the rest of the turn, so make sure you activate Invocation before using Neos Fusion.
You can banish Neos Fusion from your Graveyard to prevent Elemental HERO Brave Neos from being destroyed by battle or card effect.
Elemental HERO Brave Neos gains 100 ATK for each “Neo-Spacian” and “HERO” monster in your Graveyard. If you have at least 1 Elemental HERO Neos in your Graveyard, Brave Neos will be able to get over a Legendary Six Samurai - Shi En, a Darklord Ixchel (in Attack Position), and it will tie with Darklord Nasten.
When Elemental HERO Brave Neos destroys an opponent's monster by battle, it allows you to add 1 Spell/Trap from your Deck to your hand that specifically lists the card “Elemental HERO Neos” in its text. You can use Elemental HERO Brave Neos’s effect to search Neos Fusion.
Since Beatdown is soon going to be limited to a “once per Duel” usage, it’s only natural for us to turn to this Skill. After all, we don’t need 900 ATK to get over another Elemental HERO Brave Neos; 300 will suffice.