Kuo-Toa Psion

Playtime — When Kuo-Toa Psion enters the
battlefield, put a -1/-1 counter on up to one
target creature and tap it. It doesn't untap
during its controller's untap step for as long
as you control Kuo-Toa Psion.
Magic Resistance — Ward {2}.
Natural Naivete — When an opponent pays the
cost of Kuo-Toa Psion's ward ability, sacrifice
Kuo-Toa Psion.
Artwork/creature source:
https://www.youtube.com/watch?v=BraYqeJF9to