Tao, The Deep's Conduit

Non-Creature spells you cast have cascade.
All creature spells you cast may be cast as if they had delve.
Unfathomable 3 (When Tao, The Deep's Conduit enters the battlefield draw 3 cards,
you may play any instant or sorcery spells
with converted mana cost 3 or less, discard any permanents.)