from the REG
"Ignore is a special ability that protects a card from being defeated, harmed, or affected by the ignored card. It also prevents the card with ignore from harming or affecting the ignored card. An ignore card stops an ignored character from entering the Field of Battle. An ignore ability can be a successful blocking or rescuing card. Ignore is the same as “has no effect” and repel."
Basically, if you ignore something, they can't hurt you (without negating the ignore), and you win the battle without discarding the opposing character if they are ignored at the end of the battle. Numbers don't matter in ignore.
