The Embereth one costs four, and then in your upkeep you make a 3/1 which is a Knight
Main Phase actions in Disney Lorcana During their Main Phase, each player can perform any number of actions, any number of times, as long as they have the ink and readied cards to do so
To keep these high-value cards pristine, I recommend Ultimate Guards Katana sleeves
Sacrifice to net four cards in your hand, and get it back on your next upkeep
The escape cost is equal to the cards mana cost plus exile three other cards from your graveyard
If you dont have any Anthem effects, youre effectively doubling the damage your creatures will deal, and youll be gaining life to boot