Doing quests to defeat these creatures for a card reward (any black card, any sorcery, etc) is a good way to fill out the remaining rare slots in your deck like more Contracts and the dual lands
Granted, Im in the camp that thinks WotCs desire to break away from the lore of Dominaria is kind of really stupid, but functional reprints are always fine in my book, and they typically make for sweet cube inclusions since they usually offer effects that you WANT to be redundant
Expect to see this card not only in standard decks but, potentially, all formats with decks that play Green and Black
Viashino Pyomancer was an unimpressive dork in Limited Magic, but since we live in an age where Red is allowed to crush Magic until the end of days, where does it go wrong
Any damage you deal to an opponent or an opponent's permanent is doubled, while any dealt to you or a permanent you control is halved instead
If a creature with toxic deals combat damage to a creature or planeswalker, or if it deals noncombat damage, toxic has no effect and no player gets poison counters
