That's almost prohibitively high with cards that seek to use mana for their discard engine-ing, such as Compulsion
Its worth mentioning Scheming Fence enters as, meaning its not a triggered ability, so people cant sacrifice/destroy/exile the permanent youre choosing, just like with Spark Double
While Disciple does lose out a bit on not being an artifact and having to target one player, there was no chance it wasn't making it into the deck
Mushu, Your Worst Nightmare, giving one of your characters Rush, Reckless, and Evasive means you're able to send a tank in to wreak havoc and send your opponents' characters to the discard
Leyline Axe Rarity: Rare TYPE: Artifact SUBTYPE: Equipment CMC: 4 Mana cost: USD: $38.26 EUR: 16.64 TIX: 0.02 EDHREC RANK: 1467 If this card is in your opening hand, you may begin the game with it on the battlefield
Free cards are so much better than cards you have to pay for, and being able to land this on turn five (or earlier) is sure to make you a target, but could also make you unstoppable