Magic: The Gathering has a fairly straightforward yet intricate resource system, where you use mana to cast spells, progressively playing more powerful cards as you generate more mana with each passing turn
Professor Dellian Fel Not that Prof Professor Dellian Fel is a clean cut planeswalker that starts real close to an emblem of Sanguine Bond
Boi-oing I understand that this is an incredibly niche deck theme with even more niche commanders
They need to have a major impact on the game
With other complementary artifact mana sources like Thran Dynamo and Grim Monolith, decks could count on being able to get the kind of mana you'd need to justify packing the cards that would let you use the mana from Metalworker to deliver the knockout blow, and their presence lets you turn that Metalworker mana into permanent giant amounts of mana rather than just a one shot deal
By Poisoning them first, the 10 damage from Poison after your turn and the 10 damage after their turn will put them at 220 total damage, guaranteeing a Knock Out before you even start your next turn