Thanks for trying the game, Dolan! I could have made the basics clearer. You don't need any prior bingo experience—here's a quick guide:
1. Each turn, spend mana to play cards from your hand. Strike damages an enemy, Guard gives you Block against incoming damage, and Lucky Call rolls extra numbers. Check the enemy's forecast to decide when to defend.
2. When a rolled number matches a number on your 5×5 Soul Ledger, that square is marked automatically. Mark all five squares in a horizontal row, vertical column, or diagonal to complete a bingo line. This activates the sigil equipped to that line, giving you a combat bonus. Each line can activate once per battle.
3. When you're done playing cards, click End turn (or press E). The enemies act, then you get fresh mana and a new hand.
The winning condition is to defeat the enemies by reducing their HP to zero while keeping your own HP above zero, then follow the map and defeat the final boss to finish the journey. Completing a bingo line helps you win battles; you don't need to fill the entire board.
I recommend starting with Practice battle from the title screen, and the Guide is there for reference too. Thanks for asking—this is helpful feedback on the introduction!