We beat the TzKal-Zuk and upgrade your ranged kiln cape to the Necromancy Igneous Cape, also known as the Igneous Kal-Mor, within 24-48 hours depends on your time zone .

Feel free to gear up according to this guide so no bank pin needed. https://runescape.wiki/w/TzKal-Zuk/Strategies

Requirements :

85+ Tier Necromancy Power armour