I understand why - If you could just storm off and pump this to oblivion, it might be broken in eternal formats
Most importantly, it's a lot of fun to play and doesn't feel like bad burn because rather than using Tome Scour like a horrible Lava Spike, we are looking to play a small number of mill creatures and keep bouncing them back to our hand to use their mill abilities over and over again
We came up with a card that could be turned into a second card by rotating it 180 degrees
Play Rules/Modifiers A battle of strategic wits, this format plays with decks of lands (Plains, Island, Swamp, Mountain, Forest) and one single card: Momir Vig
On the other hand, if untapping multiple permanents is part of a cost (such as that of Halo Fountain's last two abilities), you can't "untap" the same permanent more than once to pay that cost
White loves tokens and black easily converts a field of tokens into direct damage via sacrifice cards and Blood Artist effects