Tyche's spellcasting ability is Charisma (save DC 16, +8 to hit with spell attacks).

Firebolt, Gust, Mage Hand, Message

Hold Monster, Greater Invisibility, Raulothim's Psychic Lance

Blink, Major Image, Wall of Water

Alter Self, Detect Thoughts, Lesser Restoration, Protection from Evil and Good, Chromatic Orb, Mage Armor

Heightened Spell (1x/day). When Tyche casts a spell that forces a creature to make a saving throw, Tyche can give the target of the spell disadvantage on its first saving throw against the spell.

Subtle Spell (1x/day). When Tyche casts a spell, she can cast it without any somatic or verbal components.

Twinned Spell (1x/day). When Tyche casts a spell that targets only one creature and doesn't have a range of self, she can target a second creature in range with the same spell.