That means five more chances at multiple rare cards, which can be huge for growing your deck
This list isnt running them, but I could see how a couple of Sages Training would be nice here to help facilitate the discarding, so consider testing that card out
It cannot be destroyed by battle
Some collectors like magnetic or photo-holder solutions for easy swaps
The reason why theyre so valuable though, is because theyre all artifacts, you can play a land and one of these Mox on your first turn, giving you access to at least two mana for free on your first turn
For three mana it becomes a 4/4, and then for six mana Figure of Destiny becomes an 8/8 with both flying and first strike, which is a heavy commitment, but ensures you have a threat late in the game