Its more than an additional supertype: snow can also be a strategy by itself, enabling new and interesting game styles
Nyssa of Traken Universes Beyond crossovers like Doctor Who are how you end up with Nyssas and Nissas in the same game
Ugluk of the White Hand FromTheShire: Classic creature that gets big and then gets chump blocked because it has no evasion, this is here as a signpost card to tell you that Rakdos cares about Orcs and Goblins in draft and then as begrudging playable in your Orc deck because there aren't enough good Orcs yet
Having an Abrupt Decay in hand or in deck with more removal, it might be better to proactively take that pesky planeswalker, or counterspell, or Path to Exile, or any non creature card
Just mill Agent of Kotis into your graveyard, and use her effect to grant him two +1/+1 counters, and you're already two thirds of the way to getting The Lord Master of Hell online