You pull wisps of shadow material from the Shadowfell to create an object within range. It is either an object of vegetable matter (soft goods, rope, wood, and the like) or mineral matter (stone, crystal, metal, and the like). The object must be no larger than a 5-foot Cube, and the object must be of a form and material that you have seen. The spell’s duration depends on the object’s material, as shown in the Materials table. If the object is composed of multiple materials, use the shortest duration. Using any object created by this spell as another spell’s Material component causes the other spell to fail. Materials Material Duration Vegetable matter 24 hours Stone or crystal 12 hours Precious metals 1 hour Gems 10 minutes Adamantine or mithral 1 minute Using a Higher-Level Spell Slot. The Cube increases by 5 feet for each spell slot level above 5.
RollQuest summary Duration scales by material.
SRD 5.2.1, p.121 · CC BY 4.0
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Cast Creation on a real battle map. Pick a caster and a target and RollQuest plays the effect for everyone at the table. Free to start.
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The builder walks you through class, species, ability scores and spells, then you cast Creation straight from the sheet. RollQuest rolls the dice with your spellcasting modifier, posts the total in chat for the table and keeps count of your spell slots. Try the DnD character creator, for 5e and 5.5e.