Easter Egg is one of the few cards having only a promo version. Obtainable only by Achievement during Easter 2019 and for free at Easter 2020. Cannot be traded or purchased.
LoreThis card has no associated lore.
Tips & StrategiesN/A
Promo cards are already fully upgraded by default and thus do not have upgrade cards. This also applies, if the card has no normal version but only a promo version.