In short, with Magecraft, cards with the ability to copy instants and sorceries are your friend in a way that just arent for other spell payoffs
While the keyword costs a creature on your board to be consumed, you benefit from the effect detailed on the Exploit card, as well as letting you play into any sacrifice or graveyard synergies your deck may be built around
Doing so, however, will involve opening a lot of booster packs (since we doubt you'll get all of the cards you need straight away)
When you tap a Swamp for mana, make another B
Thats a huge tax anytime you want to give your commander another piece of equipment
You wouldn't want them to be anyways, since you would pay more in shipping than the pennies are worth