and the fire damage to the second creature increases to 1d8 + your spellcasting ability modifier. Both damage rolls increase by 1d8 at 11th level and 17th level.;Warlock (SCAG)
you can maintain your concentration on the spell for up to 8 hours. When you use a spell slot of 5th level or higher
you can move the sphere up to 30 feet. If you ram the sphere into a creature
the target can make a Wisdom saving throw at the end of each of its turns. On a success
any creature of your choice that you can see that starts its turn within 10 feet of you has its speed reduced by 10 feet until the start of your next turn.
At Higher Levels: When you cast this spell using a spell slot of 4th level or higher
the spell ends for that creature. ;Warlock
20 feet high