Whenever you cast a noncreature spell, you may have this enchantment become a 3/3 Sphinx creature with flying in addition to its other types until end of turn.
{2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Mana cost
1
U
Mana value
2
Printings
From
$0.11
EDHREC rank
#26406
Buy
Formats
Pioneer
Legal
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
23 Jun 2020
Riddleform's first ability resolves before the spell that caused it to trigger but after targets for that spell are chosen. It will resolve even if that spell is countered.
23 Jun 2020
If Riddleform becomes a creature the same turn it enters the battlefield, you can't attack with it unless it gains haste.