It is not that it is any harder than Obosh to make as your companion, just that you also have to build a deck that wants it and that is good for Gyruda as well
The equip cost for Rope is a little steep, but boosting a creatures toughness and making it blockable by only one creature might be worth it
Similarly, replacement effects that modify how creatures you control enter the battlefield will see Arixmethes entering as a creature rather than a land
The more parent sheets you need for your project the higher your cost
Artifact Creature Toy Uncommon Domenico Cava 4/3 LEGAL Standard LEGAL Future LEGAL Historic LEGAL Timeless LEGAL Gladiator LEGAL Pioneer LEGAL Explorer LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage LEGAL Penny LEGAL Commander LEGAL Oathbreaker LEGAL Standardbrawl LEGAL Brawl LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern NOT LEGAL Predh Double strike Patched Plaything enters with two -1/-1 counters on it if you cast it from your hand
I personally think that the deck was intentionally set to two colors to both align with the popular new character, Saheeli Rai, and to make sure it felt meaningfully different from the four-color artifact deck from Commander 2016