yugioh card gaia the fierce knight Yu-Gi-Oh! Limited Edition Metal – Fanattik Trade Legend of Blue Gaia The Fierce Knight (archetype)

They are evensomehowStandard legal, so anyone playing that format on Arena is going to run into these options

SP3CTR3_chelts says

Franchise Magic: The Gathering Publisher Wizards of the Coast Player Count 2+ players Age Recommendation 13 years and up Original Release Date August 5, 1993 Designer(s) Richard Garfield Created by Richard Garfield in 1993, Magic: The Gathering (MTG) has become one of the biggest tabletop collectible card games in the world

A creature with 0 power can attack, as long as it doesn't also have defender

Whats neat here is that the hexproof ability is virtually always on so long as you have a few cards in hand, without actually needing to use it