Useless Library

{1}, {t}: add {c} to an opponents mana pool.
{1}, {t}: you may search your library for a card,
then put that card on top of an opponents library.
Players may not use mana. Creatures lose all abilities and have base power and toughness 0/1.
Non-permanent spells turn into enchantments
that say "at the beginning of your upkeep,
search your library for a permanent, then
put it on the battlefield.