Keen Hearing. The warden has advantage on Wisdom (Perception) checks relying on hearing.
Echolocation. The warden can't use its blindsight while deafened.
Aura of Shadow. The warden radiates an aura of magical darkness out to a radius of 20 feet and dims bright light to dim light out to an additional 20 feet.
Multiattack. The giant makes two Slam attacks.
Slam. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 30 (5d8 + 8) bludgeoning damage.
Description
Wandering ancient cities corrupted by sculk infection, wardens are summoned by shriekers which detect the presence of creatures nearby and alerts the wardens. Wardens are towering creatures in a vaguely humanoid shape, but it has no eyes, but one gaping mouth where nothing except unnerving croaks escape. It chest is open, exposing several ribs and a large glowing heart. On the sides of its head, two sensitive hornlike detectors sense and feel the air for vibrations. All light near the wardens is dimmed, giving itself the brutal advantage over interlopers.
You forgot the sonic boom
This was made during the snapshot before that