Don't buy/craft this sword. It is horrible.
Here is some data I gathered:
Depth 16
Level 10
No UVs
.................+------+------+------+
.................|. 1st | Last |Charge|
-----------------+------+------+------+
Tempered Calibur |.. 89 |. 113 |. 168 |
-----------------+------+------+------+
Cautery VS Slime |.. 94 |. 119 |. 176 | +. 5%
-----------------+------+------+------+
Cautery VS other |.. 76 |.. 98 |. 150 | - 15%
-----------------+------+------+------+
Other important factors not shown in this graph:
- Cautery Sword is a dead-end crafting line, the Calibur is not.
- The Calibur's charge attack can hit up to three times and has excellent knock-back. The Cautery Sword's charge hits only once and has almost no knockback.
And the sky is blue.