From Melvor Idle
This page is up to date (v1.2.2).
Pet ID: melvorD:Ty
Source: Mastery
Drop Chance: See: Acquiring Pets
Effect: +3% Global Mastery XP
Part of 100% Completion: Yes

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.

[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 Ancient Relics gamemode.