There are infinite combos that outright win you the game, like with Walking Ballista, but Heliod can be a centerpiece of devotion decks, +1/+1 counters, lifegain decks, and enchantment-based decks
Hes really not strong enough to warrant such a high cost, but when you have games where you struggle to get Deserts in the yard, his absence is really felt
So, running Unholy Annex // Ritual Chamber , a Room Enchantment, to add more card draw never hurt, and the best part is that Valgavoth is a demon and can immediately take advantage of the the Unholy Annex side
I'd lead with Zellix on turn three and then the Hermit the next turn once you can tap it
That would inevitably lead to me playing Opalescence and then finding some level 1 judge and asking them to explain the interaction to me
When you reveal a creature card this way, put X +1/+1 counters on target creature you control, where X is the mana value of that card