Motion Sickness

Enchantment
Creatures with haste can't attack.
***
This is just a dinky little card that popped into my head tonight. I thought to myself, "If 'Motion Sickness' were a card, what would it do?" Motion seemed to be an obvious reference to Haste and this spell followed shortly from there. It isn't intended to be good at all. It's just intended to be a cute trick that blue can use to tick off the occasional red mage. I know that the "can't attack" mechanic has migrated to white, which is also an enemy of red, but this simply didn't f*eel like a white card to me. I suppose I could change it to "Return each creature with haste to its owner's hand," but given that they have haste, that seems kind of pointless. Any other suggestions regarding how we could pick on hasty creatures?