pokémon tcg: mega evolution card list Spreadsheet - Pokemon Master Set Tracker - Pokemon TCG - Trading Game Excel Mega Évolution cards revealed :

You can find LP copies much more often on TCGplayer than those in worse conditions, so expect to pay around $7.37 and upward if you don't mind settling for an imperfect card

Grim Lavamancer Grim Lavamancer used to be a premium 1-drop in Modern decks thanks to its ability to add reach to a deck

The 3/3 body is a tad small to risk regularly in combat, but you can always send your other Frogs (or changelings) to earn the trigger or just use one of the other spells from this list 11

Also don't sleep on the free bounce of Otawara in that format as well, although some of the others aren't powerful enough for Type Four