Spell Worm

Enchant {3}{w}(You may sacrifice a non-token
creature you control with {3}{w} in its casting cost
to exile this permanent, then return it to play under its
owner's control.)
Flash
When Spell Worm enters play, target opponent reveals their hand and you name a non-land card.
That opponent can't cast the named card until
Spell Worm leaves the battlefield.