Dont worry, you can always play the pre-built decks that the game provides every season to play unrated PvP games just for the sake of completing your quests
Though both are almost the same, the difference is that, with Demolition Field, you guarantee only you and the opponent which you used this on have a basic land, instead of each player having it
Theres also something fun about making your opponent make the call on the flip that could decide the game
It offers very little above and beyond being a counterspell but it is the very best at being a counterspell and therefore is also one of the best cards there is for allowing you to dictate the flow of a game
Mareep can then also change to Attack mode with its Thunder Jolt attack, dealing a reasonable strong 30 damage each turn
The idea here is that this spell can prove benefecial in a number of situations due to its strange flashback cost