Corrupting. While burrowed the corruption host can use its movement to corrupt the ground around it. The first time using this trait the ground in a 30 ft. sphere becomes corrupted. Using it another time at the same position will spread the corruption 20 ft. further. After reaching 150 ft. the corrution will spread at a much slower pace about a few inches a day. If the corruption host stops corrupting the ground the corruption will retreat at 5ft. per day until it disappears. Plants, that grow on corrupted ground will die or become corrupted so will animals, that live in corrupted areas.

Breading. As a bonus action the corruption host can spawn two [Tooltip Not Found] in a unocupied space within 5 ft of itself. A corruptling has 9 (1d12 + 2) hit points, which the corruption host will lose for spawnig it.

Multiattack. The corruption host makes one Bite attack and two Claw attacks.
Or it makes two Claw attacks and uses Consume.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 2) slashing damage.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) pircing damage and 9 (1d10 + 3) necrotic damage. The corruption host regains hit points equal to the amount of necrotic damage dealt.

Consume. The corruption host consumes somthing organic within 5 feet, that is corrupted or has died reasently like a fresh unsecured corpse or dieing plant. By this the corruption host regains 14 (2d10 + 3) hit points.