Level 3 Celestial Warlock Spell Selection
At level 3, your warlock gets their patron features and your first full set of spells known. Celestial is one of the harder patrons to slot together well because its list skews support-heavy, and support spells in D&D 5e are generally underpowered unless you know how to stack them. Your cantrip selections matter more than most players realize at this point. Light is fine but rarely gets cast past the first couple of sessions once the party picks up darkvision. Sacred Flame is solid — it ignores cover, which comes up way more often than people expect. Thaumaturgy is flavor. If you're playing a Celestial for roleplay reasons, take it. If you want to be useful in a fight, skip it. For your 1st level slots, here's what actually works:
Healing Word. This is non-negotiable. The action economy on this spell is what separates a warlock who contributes to combat from one who just fires eldritch blasts and waits. You get one bonus action heal per round, which means you're still casting a cantrip with your action. At level 3 your slots are limited — you only have two 1st level slots — so every one of them needs to pull double duty. Healing Word does that. Shield of Faith. Warlocks have d8 hit dice and typically poor AC unless you're building around heavy armor, which most aren't. Shield of Faith gives you +2 AC as a bonus action, and it lasts for a full minute. That's ten combat rounds of free defense. I had a character who stacked this with the Armor of Agathys invocation at level 3 and basically couldn't be burst down by any solo enemy encounter until the DM started sending groups. Not a complaint, just a note that this spell has more combat relevance than its description suggests. Guiding Bolt. This is your damage spell when you need it to matter. The advantage on the next attack is where the value lives, not the damage roll itself. Advantage on a single attack is worth roughly half a damage die in expected value, which is significant at this power tier. I've seen players ignore this because they want the big number on the bolt, but the real win is giving your martial character advantage on their next strike. It synergizes with almost any party composition.
Bless. This is situational. Against a single tough enemy, it's mediocre. Against a swarm of goblins or any encounter with four or more enemies, it becomes genuinely good because you're rolling four extra d4s per round across your allies. The problem is concentration, and warlocks have no way to protect it. If your DM runs tight, focused encounters, Bless will fizzle out after two rounds and you'll have wasted a slot. If your DM runs mob encounters, it's one of the best spells in the game. Know your table before locking it in. Cure Wounds. This is redundant if you already have Healing Word. Both are on the Cleric list, and Healing Word outclasses it at every level due to action economy. The only reason to take Cure Wounds is if you're running out of slots and need something you can cast with your action while also needing to heal more than 1d4+Wisdom. I took it once on a long-rest-light campaign and used it exactly twice before replacing it. Not worth the slot in most parties. One thing nobody tells you about Celestial warlocks: your Enhanced Divine Sight feature at level 6 lets you see invisible creatures and spell effects, but it doesn't help you find hidden ones. I ran into this at a table where the DM had a rogue using Greater Invisibility with the Hide action. Enhanced Divine Sight let me see the rogue, but I still couldn't target them because they were effectively hidden behind total cover from my perspective. The workaround was having my wizard cast Detect Thoughts or having a barbarian with Keen Senses nearby. Just something to keep in mind when you hit level 6.
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For your remaining slot, pick between Spiritual Weapon (if you can reach level 5 for that, since it's a 2nd level spell you'll get then) or save the slot for something like Silence if your party keeps getting disrupted by enemy casters. Silence is weirdly strong at low levels and warlocks get it on their list through Celestial, which most people miss. The broader pattern here is that Celestial warlocks at level 3 are support hybrids. You're not going to out-damage a Hex blade or a Fiend. Your value comes from healing, buffing, and enabling. If that doesn't fit your table's playstyle, consider whether the patron is the right fit before investing further.
