Raidraptor

Play first to summon Final Fortress Falcon:

By having at least 3 raidraptor monsters, and at least one of them has original level 4, you can make this combo. Summon Wise Strix, leaving the one monster with original level 4, activate Wise Strix and summon Mimicry Lanius. Summon Raider's Knight, activate it and summon Brave Strix, now set Rank-Up-Magic Skip Force by the effect of Wise Strix. Activate Brave Strix and add to your hand Rank-Up-Magic Raidraptor's Force. Now activate Rank-Up-Magic Skip Force, summon Arsenal Falcon. Activate Arsenal Falcon detaching Brave Strix, summon Strangle Lanius. Activate Rank-Up-Magic Raidraptor's Force and use Arsenal Falcon and Brave Strix to summon Final Fortress Falcon.

At the end of the combo, you can use Mimicry Lanius in your GY to add one raidraptor card from your deck to your hand. You can also the effect of Strangle Lanius to summon one level 4 raidraptor monster from your GY, summon Force Strix and use its effect to add one monster from your deck to your hand. 

If you go second and your opponent has a monster on their field, wich can be targeted, you can make a similar combo, the difference is, instead of using Rank-Up-Magic Skip Force, use Phantom Knights' Rank-Up-Magic Force, banish 3 monsters from your GY, select Brave Strix and summon Satellite Cannon Falcon, activate its effect detaching Brave Strix (you must have at least one monster in your GY to activate this effect). Now use Rank-Up-Magic Raidraptor's Force with Satellite Cannon Falcon and Brave Strix, then summon Rising Rebellion Falcon.