A commander with affinity is already annoying because its hard to kill but extending that ability to your instants and sorceries makes you unmanageable
Most of these rankings are broken into two tiers with the first being the weaker version, the second being the higher
Its not all fun and games, though: Cold exposure can be downright deadly
Also regarding interacting with what comes from the Exile, we use several cards that bring support to it - Nalfeshnee and Mizzix, Replica Rider to copy our spells, The Lost and the Damned to create more tokens, Passionate Archaeologist and Keeper of Secrets to deal damage to our opponents directly, and, to indeed make these spells happen from the Exile, we have Etali, Primal Storm and Plargg and Nassari
One one hand, it feels like he has a lot of abilities, on the other Id have maybe preferred this card to have one of those abilities gated behind a once per turn tap down sacrifice a creature-type ability line instead, so that Vogar itself could sacrifice a creature
Mono-color decks like Krenko (red) and Goreclaw (green) are cheapest because they skip the expensive multicolor mana base