Challenges: Kneel Lost Oasis to choose a Martell character. Until the end of the phase,that character gains Stealth and 'after this character bypasses a character by using Stealth,kneel that character.'
If one player has Lost Oasis and his opponent has The Red Viper who is immune to character abilities, is the Viper able to be knelt with a character who is attacking and using Lost Oasis?