The target won't be stopped from untapping during its controller's next untap step
This is great for decks like Rakdos midrange in Pioneer that have historically had rough times dealing with Rakdos Sacrifice
It goes without saying that not all draft formats are equally liked, and the product's price is indeed a concern but I'd hazard a guess that drafters would be happy to have the option of a new set to draft every six or seven weeks
First, spells are cards that have been cast but not yet resolved, every card in the game that is not land will be a spell at some point - instants, sorceries, creatures, artifacts, enchantments and planeswalkers
UltimaDragon didn't specify the playstyle for this deck
Many of the stronger card-drawers actually cost significantly less or give you some bonus for your 2-mana-per-card investment