D&D 5e Level 9 Spells
All 16 D&D 5e level 9 spells. To cast one you need a level 9 spell slot or higher. Many lower-level spells scale up when cast from a higher slot — check each spell page for the "At Higher Levels" rule.
What level 9 spells do
Level 9 D&D 5e spells unlock at character level 17. One slot per day, and only certain classes ever get there. Wish, True Polymorph, Time Stop, Power Word Kill, Meteor Swarm, Foresight, Mass Heal, True Resurrection.
How to pick level 9 spells
How to pick level 9 spells: every option is campaign-defining. Wish is the most powerful spell in the game; True Polymorph permanently transforms reality; Time Stop bends the action economy.
Tier expectations at level 9 spells
At tier 4, players usually plan an entire arc around when to cast the 9th-level slot. The DM should expect the spell to reshape what was supposed to happen in the encounter; that's the bargain for getting to tier 4 at all.