Prophecy is very important and unique keyword in TES:Legends. Cards with this keyword can break the game. If you destroy an enemy rune (after he loses every 5 health, maximum for 5 times) he will draw a card. If this card has keyword Prophecy, your opponent will play it for free. Cards with all of attributes have this keyword. Some cards with this keyword can deal damage (Lightning Bolt
Fire Storm
Grahtwood Ambusher
Fharun Defender
Mountain Tyrant
Piercing Javelin
Fate Weaver
Prophecy is a very important element of building Control decks. You can get an extra Heal, Guards, AOE effects, extra damage or draw etc that is very important to control the board and to live more turns.
In Midrange decks you must also have Prophecy cards to control the board and to have extra minions for good trades. Cloudrest Illusionist
We can also see Prophecy cards in Aggro decks. Budget Aggro Battlemage has some cards that deal damage to all players. So we can find Lightning Bolt
In arena it’s very important to have Prophecy cards.