Ugin, the Spirit Dragon (279) (Borderless) [Core Set 2021] HGSS14 Set: Portal Three Kingdoms Type:

Set: Portal Three Kingdoms Type: Creature — Cat Rarity: Uncommon Cost: {2}{G}{G} Forestwalk (This creature can't be blocked as long as defending player controls a Forest

They can be used as a couch companion

1× Rules Reference Guide

and you can have Apollousa lose 800 ATK to negate the activation of any opposing monster effect

five dragons conquered death to rule the living

Ugin, the Spirit Dragon (279) (Borderless) [Core Set 2021] HGSS14 Set: Portal Three Kingdoms Type:Set: Core Set 2021 Type: Legendary Planeswalker Ugin Rarity: Mythic Cost: {8} +2: Ugin, the Spirit Dragon deals 3 damage to any target. X: Exile each permanent with mana value X or less that's one or more colors. 10: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.