Pricing can be found below
Your opponent also cant normally interact with that cost either since the chances of you running into a mill-based deck are slim to none in most tournaments
His Catch ability allows you to ignore the equip cost of the card, and Throw can turn to Hammer into damage to remove multiple different threats
But if you're looking to hire the Toolbox himself, you gotta have the goods
You can choose to draw a bunch of cards with Necrodominance, then still in your end step, cast Soul Spike for free before you would go to discard
Korvold, Fae-Cursed King One of the most busted sacrifice commanders in the game, Korvold, Fae-Cursed King tends to exploit Treasure more often than other creatures, but its still lets you sacrifice your Shambling Ghast and similar cards while rewarding you with plenty of card draw for taking the game actions your deck wanted to do anyway