Ty is a pet that is not tied to any specific skill. Instead, Ty has a chance to be acquired whenever an action that rewards Mastery experience is performed. Unlike any other pet, the chance to get Ty scales with the player's Mastery Pool Percentage.

This page is up to date (v1.3).
Ty
Ty
Pet ID: melvorD:Ty
Source: Mastery
Drop Chance: See: Acquiring Pets
Effect: +3% Global Mastery XP
Part of 100% Completion: Yes

[math]\displaystyle{ \text{Chance} = \dfrac{\text{Action Time (seconds)} \times (1 + \frac{\text{Mastery Pool Percentage}}{100}) \times \text{Virtual level of Skill}}{25\;000\;000} \times (1 + \frac{\text{Increased Pet Chance}}{100}) }[/math]

Where [math]\displaystyle{ \text{Mastery Pool Percentage} }[/math] is the Player's Mastery Pool Percentage clamped between 0 and 100 and [math]\displaystyle{ \text{Increased Pet Chance} }[/math] is any modifiers that increase the chances of locating a skill pet. Currently, this is limited to the AoD.png Ancient Relics gamemode.