Sword of Hope
Purchase from the Sword of Hope NPC at /icerise.
Sassafras' War Helm
Complete Anthon's "Mana for the Magi" quest at /battlefield by defeating Slimes at /swordhavenbridge.
Complete Gravelyn's quests at /alpine to unlock the "Forest Guardian Guantlet" quest - complete it by defeating Wendigo in the same map.
Complete the quests from /coldwindvalley. After finishing "Check out the Cave" from Ice Master Yeti, complete "Holly and Ice" from Blizzy at the same map - defeat Snow Golems and click arrows around the map.
Defeat Karok the Fallen at /northstar. You may need to first complete the quests at /frozentower > /frozenruins > /northstar.
Infernal Ice Heart
Merge 5 Frozen Orbs and 5 Crypto Tokens at Vinara's Odd Shop at /curio.
Get Frozen Orbs by defeating Wargoth the Frozen at /frostvalfuture - you have to complete the quests at /frostvalpast > /frostvalnext > /frostvalpresent > /frostvalfuture to access this.
Get Crypto Tokens by completing Vinara's "Odd's 'n' Ends" daily quest by defeating a Sneevil at /boxes.