Whenever you cast a noncreature spell, you may have Riddleform become a 3/3 Sphinx creature with flying in addition to its other types until end of turn. {2}{U}: Scry 1.
The next spell you cast this turn can be cast as though it had flash. When you next cast a spell this turn, put X +1/+1 counters on up to one target creature, where X is the mana value of that spell.
The mountain will build your cairn of snow and ice and stone.
{2}: Equipped creature gains hexproof until end of turn. At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's blue. Equip {1}