Here is RS The Knight Before Christmas guide regarding tier 21-30 tasks for P2P and the rewards for these ten tiers. 

RS The Knight Before Christmas tier 21-30 tasks for P2P 

1. Tier 21 
Task A: Fish Green blubber jellyfish, Beltfish, Sharks, Great white sharks, Manta Rays, Cavefish, Rocktails, Blue blubber jellyfish, Wobbegong and Sailfish. 
Task B: Burn Yew logs, Magic logs, Corrupted magic logs, Elder logs, Driftwood and Driftwood (damaged). 
2. Tier 22
Task A: Present Hunt
Task B: Complete clue scrolls. 
3. Tier 23 
Task A: Herblore
Task B: Complete Frozen/Abandoned/Furnished/Abandoned 2/Occult/Warped dungeon floors. 
4. Tier 24
Task A: Earn base XP in Smithing
Task B: Chop Yew logs, Magic logs, Elder logs, Bamboo and Golden Bamboo.
5. Tier 25
Task A: Agility
Task B: Complete slayer tasks.
6. Tier 26
Task A: Prayer or Crafting
Task B: Collect Vibrant/Lustrous/Elder/Brilliant/Radiant/Luminous/Positive/Negative/Incandescent/Ancestral energies. 
7. Tier 27
Task A: Mine Orichalcite ore, Drakolith, Necrite ore, Phasmatite, Bane ore, Light animica and Dark animica. 
Task B: Farming
8. Tier 28
Task A: Thieving
Task B: Cooking or Smelting
9. Tier 29
Task A: Earn Thaler by playing minigames. 
Task B: Archaeology (Excavation).
10. Tier 30 
Task A: Runecrafting
Task B: Complete Frozen/Abandoned/Furnished/Abandoned 2/Occult/Warped dungeon floors. 

RS The Knight Before Christmas tier 21-30 rewards for P2P 

The rewards for completing P2P tasks from 21 to 30 are listed below following tier orders: 
1. Glacial siren wand; medium Phoenix lamp.
2. Large bonus XP star; medium cash bag. 
3. Prismatic lamp (medium, huge)
4. Medium supreme star
5. Glacial siren cosmetic overrides; +2% Herblore XP for the duration of the Yak Track; 500 oddments.
6. Small cash bag; medium smouldering lamp. 
7. Small lava lantern; huge bonus XP star.
8. Small Phoenix lamp; medium cash bag. 
9. Ice wings; large supreme star. 
10. +2% Archaeology XP for the duration of the Yak Track; medium protean pack; 2 cinder cores.

Complete RS The Knight Before Christmas tier 21-30 tasks now for rewards. Besides, please buy cheap RS3 gold from us at all times. 

The RS3gold Team