Earthquake Dragon

This spell costs {X} less to cast, where X is the total mana value of Dragons you control.
Flying, trample
{2}{G}, Sacrifice a land: Return this card from your graveyard to your hand.

Alchemy Horizons: Baldur's Gate

Commander Legends: Battle for Baldur's Gate

This spell costs {X} less to cast, where X is the total mana value of Dragons you control.
Flying, trample
{2}{G}, Sacrifice a land: Return Earthquake Dragon from your graveyard to your hand.

Battle for Baldur's Gate Promos

Earthquake Dragon's last ability can be activated only if it is in your graveyard.

If a permanent has {X} in its mana cost, X is 0 when calculating its mana value.

If the total mana value of Dragons you control is 14 or greater, Earthquake Dragon costs {G} to cast.

Once a player has announced that they are casting Earthquake Dragon, no player may take actions to try and change the number of Dragons its controller controls before that spell's cost is locked in.

The total cost to cast Earthquake Dragon is locked in before you pay that cost. For example, if you control three Dragons, each with mana value 4, including one you can sacrifice to add {C}, the total cost of Earthquake Dragon is {2}{G}. Then you can sacrifice the Dragon as you activate mana abilities just before paying the cost.