Palladia-Mors, the Ruiner [Core Set 2019 Prerelease Promos] Weatherlight puts it on the bottom

puts it on the bottom of their library

choose target opponent

Ignore this effect for each creature the player didn't control continuously since the beginning of the turn

but the most remarkable was their ability to withstand Westley's ferocious chewing

Palladia-Mors, the Ruiner [Core Set 2019 Prerelease Promos] Weatherlight puts it on the bottomSet: Core Set 2019 Prerelease Promos Type: Legendary Creature Elder Dragon Rarity: Mythic Cost: {3}{R}{G}{W} Flying, vigilance, trample Palladia Mors, the Ruiner has hexproof if it hasn't dealt damage yet. Sister of Nicol Bolas. Survivor of the Elder Dragon War. The most vicious of her kin.