CARDFIGHT!! VANGUARD S02 E11 Ruler vs Skyfall

First match of the semifinals has two powerhouse fighters facing off. It is a ferocious fight between fellow knights Bastion and Tohya with a "thirst for strength" against Youthberk and Raika who thinks "there's no meaning apart from winning". What lies beyond this fight, and what does Raika's Skyfall aim to achieve?