pokemon card mega charizard ex x M (13/108) [XY: Evolutions] Fire Inferno X (90x) Discard any amount of Fire Energy from among your Pokemon Charizard ex SAR 110/080 -

Leader cards can use an effect while outside of the main battle, before later being deployed - flipping the card over to reveal new abilities - by paying their cost to join an arena as a unit card

Demolish: Welcome back, old friend

Honorable Mentions I am adding in this section some cards I feel are good, but not good enough to become heavily played in the Leviathan format

In both cases these cards wont have an intact top coat

Planes usually have two important parts: A main ability which can be a continuous effect, such as Tazeem in Zendikar (whose ability is that creatures can't block while this plane is active), or a triggered ability, such as Undercity Reaches from Ravnica (which allows the controller to draw a card each time one of their creatures deals combat damage to a player)