When Thelia, Timeless Tinkerer enters the battlefield, put X +1/+1 counters on each artifact you control and, if it is not a creature, it becomes a 0/0 Construct creature with modular along with its other types, where X is the number of times you have invoked Thelia this game.

Whenever an artifact enters the battlefield under your control, put X +1/+1 counters on it and, if it is not a creature, it becomes a 0/0 Construct creature with modular along with its other types, where X is the number of times you have invoked Thelia this game.