How to upgrade to a 90,000XP Fire Forged First Wave - Infinite Card
First you need a matching pair of Full Art Infinite cards.
Full Art cards can be visually recognized by noticing the art of the card goes all the way to the cards edge without a boarder. The Full Art Infinite cards will be Rank 4 Leader cards. The Full Art Infinite cards are recognizable by the word "Infinite" printed in the middle of the card. They can be found either in packs or on the market such as Atomic Hub. Be sure to make sure they are identical.
Second you need 3 First Wave Upgrade Cards.
First Wave Upgrade Cards look like this.
First Wave Upgrade Cards can be purchased in the store on the Warsaken website https://warsaken.cards/store
Third you have to upgrade them in your collection.
Now you have yourself a 90,000XP Fire Forged First Wave - Infinite Card
Its important to note that Fire Forged First Wave - Infinite Cards have +10 Health