In order to fight Ignis, players must use a Key master teleport, which can be purchased from the Slayer Point Store or received as a drop from Cerberus. Permanent access can be unlocked by combining 50 Key master teleports with the Key master's key obtained as a reward from the "Doombringer" achievement. Players can then use the "Enter (hard mode)" option on the winch used to access Cerberus.
Alternatively, players that have completed the "Doombringer" achievement may access a practice mode of the fight by selecting "Enter (hard practice mode)" on the winch. Doing so costs 500 Boss tokens and provides no rewards. Dying in practice mode is considered a safe death.
Slayer Locked accounts may receive Ignis tasks starting at Prestige 4.