The best comparison I can think of for it in RDW is Searing Blaze, essentially a removal spell but one that also applies pressure
Casting Cost: Card Type: Artifact Creature - Assembly-Worker Power / Toughness: 2 / 3 Card Text: : Create a token that's a copy of target artifact
This is highly effective in competitive formats like Modern and Legacy, where many decks rely on low-cost spells like Lightning Bolt, Path to Exile, and Thoughtseize to get ahead
You can even think of mill as a legitimate win condition
A 3/3 for three mana, with three keyword abilities is already pretty solid, but Sigurd comes with two more abilities to make him even better
Solitude has become one of the most reliable removal spells across Eternal formats, offering both creature removal and lifegain on a solid body