Welcome Mat of Death

Damage Transfer. While it is grappling a creature, the rug takes only half the damage dealt to it, and the creature grappled by the rug takes the other half.

False Appearance. While the mat remains motionless, it is indistinguishable from a normal mat.

False Welcoming. Despite it's label, the mat doesn't like you.  Any creature within 10ft of the mat suddenly feels very unwelcome and like no one wants you around.

Unwanted Hugs. Melee Weapon Attack: +5 to hit, reach 5 ft., one Medium or smaller creature. Hit: The creature is grappled (escape DC 13). Until this grapple ends, the target is restrained, blinded, and at risk of suffocating, and the rug can't smother another target. In addition, at the start of each of the target's turns, the target takes (5d6 + 5) bludgeoning damage.

Bite Chur Ass. Melee Weapon Attack: +10 to hit, reach 5 ft.  The mat doesn't like you.  If the target attempts to touch the mat or hits it with a melee attack, the mat will use it's action or reaction to try and bitechurass.

Bite Chur Ass. Melee Weapon Attack: +10 to hit, reach 5 ft.  The mat doesn't like you.  If the target attempts to touch the mat or hits it with a melee attack, the mat will use it's action or reaction to try and bitechurass.

GTFO. The mat doesn't like you.  If the target attempts cross over or circumvent the mat in any way, the mat can use a legendary action to stop you.  Once per action, it can cast "Thunderwave" or "Entangle" at will.