Twisting Tendril (5e Spell)
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|Casting time:||1 action|
|Components:||V, S, M (an onyx)|
|Duration:||Concentration, up to 1 minute|
You may create a necrotic tendril with an area made up twelve 5-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube and must be with the spell's range. All creatures in the tendril's space at the start of their turn and all creatures that move through the tendril's space must make a Strength saving throw. On a failure the creature takes 4d8 necrotic damage and their speed is reduced by half until the start of your next turn. On a success the creature takes half of the damage and their speed is not halved. On your turn, you may use a bonus action to move the tendril to another space within range.
At Higher Levels. When you cast this spell using a spell slot of 7th or higher, the damage increases by 1d8 for each slot level above 6th.