Servant of Tymaret — ruling 1

A creature taps when its regeneration shield is used, not when the shield is created. Notably, you won’t be able to use Servant of Tymaret’s last ability to tap it so that its inspired ability will trigger unless Servant of Tymaret would be destroyed.

Servant of Tymaret — ruling 2

Inspired abilities trigger no matter how the creature becomes untapped: by the turn-based action at the beginning of the untap step or by a spell or ability.

Servant of Tymaret — ruling 3

If an inspired ability triggers during your untap step, the ability will be put on the stack at the beginning of your upkeep. If the ability creates one or more token creatures, those creatures won’t be able to attack that turn (unless they gain haste).

Servant of Tymaret — ruling 4

Inspired abilities don’t trigger when the creature enters the battlefield.

Servant of Tymaret — ruling 5

If the inspired ability includes an optional cost, you decide whether to pay that cost as the ability resolves. You can do this even if the creature leaves the battlefield in response to the ability.

Servant of Tymaret : règles, fonctionnement et interactions (MTG)

Servant of Tymaret is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Inspired — Whenever this creature becomes untapped, each opponent loses 1 life. You gain life equal to the life lost this way. : Regenerate this creature.

How it works : Servant of Tymaret

Original English text — Wizards of the Coast / Scryfall

#1February 1, 2014· Wizards of the Coast
A creature taps when its regeneration shield is used, not when the shield is created. Notably, you won’t be able to use Servant of Tymaret’s last ability to tap it so that its inspired ability will trigger unless Servant of Tymaret would be destroyed.
No other card is named in this ruling.
#2February 1, 2014· Wizards of the Coast
Inspired abilities trigger no matter how the creature becomes untapped: by the turn-based action at the beginning of the untap step or by a spell or ability.
No other card is named in this ruling.
#3February 1, 2014· Wizards of the Coast
If an inspired ability triggers during your untap step, the ability will be put on the stack at the beginning of your upkeep. If the ability creates one or more token creatures, those creatures won’t be able to attack that turn (unless they gain haste).
No other card is named in this ruling.
#4February 1, 2014· Wizards of the Coast
Inspired abilities don’t trigger when the creature enters the battlefield.
No other card is named in this ruling.
#5February 1, 2014· Wizards of the Coast
If the inspired ability includes an optional cost, you decide whether to pay that cost as the ability resolves. You can do this even if the creature leaves the battlefield in response to the ability.
No other card is named in this ruling.