Master Skull

Master Skulls are upgradable accessories which are rare drops in every Master Catacombs Floor. They buff and by an increasing percentage while in Master Mode.
==Obtaining ==
Master Skulls can drop from Dungeon Reward Chest in any floor in Master Mode Catacombs. Higher tier skulls drop from higher floors.
Tier	Source 	Drop Chance	Drop Chance	Cost to open
Tier	Source 	Default 	 	Cost to open
1 	Catacombs M1 (Obsidian Chest)	3.8% 	5.33% 	
2 	Catacombs M2 (Obsidian Chest)	6.41% 	8.26% 	
3 	Catacombs M3 (Obsidian Chest)	7.94% 	8.96% 	
3 	Catacombs M4 (Obsidian Chest)	6.51% 	7.02% 	
3 	Catacombs M5 (Obsidian Chest)	1.96% 	2.11% 	
4 	Catacombs M5 (Bedrock Chest) 	2.93% 	3.3% 	
4 	Catacombs M6 (Obsidian Chest)	2.33% 	2.33% 	
4 	Catacombs M6 (Bedrock Chest) 	0.65% 	0.7% 	
4 	Catacombs M7 (Obsidian Chest)	2.2% 	2.26% 	
5 	Catacombs M7 (Bedrock Chest) 	0.33% 	0.33% 	
6 	Crafting only 	 	 	
7 	Crafting only 	 	 	
=== Crafting===
Each tier of Master Skull can be crafted from 4 of the tier below it. 
==Usage==
Each tier of Master Skull boosts and by a percentage in Master Mode only.
Tier	Rarity	and boost
1 	 	1%
2 	 	2%
3 	 	3%
4 	 	4%
5 	 	6%
6 	 	8%
7 	 	10%
== Trivia ==
* It would take 4,096 Tier 1 Skulls to make a Tier 7.
*The stat boost from different tiers used to stack, meaning it was beneficial to have one of each master skull in your Accessory Bag or inventory as it could have stacked up to +34% and . This has been since fixed and it no longer works.
==History==