Exhume

You magically exhume into the ground, digging through the earth and striking enemies from below. Using this spell, you submerge into the ground. Doing this does not provoke opportunity attacks, and you gain a digging speed equal to your walking speed and gain 30ft tremor sense. You are soundless and cannot be detected besides magical means. You may do two actions with this ability. As an action on your turn, you may emerge from the ground, gaining advantage on your attack roll. After you make this attack roll, you may use your bonus action to submerge back into the ground. When doing so, creatures within range may make an opportunity attack against you. The second ability occurs when a creature is within range of a weapon attack you make. When a creature approaches within your attack range, you may make an opportunity attack with advantage. Though, the enemy can retaliate with an opportunity attack, if within range, though you gain half cover.