Drenth, Barely Sparked enters the battlefield with X +1/+1 counters on it.
-2: Create X 1/1 green Hydra tokens, where X is Drenth's loyalty, then shuffle Drenth into your library.
-2: Draw a card for each Hydra you control.
-5: Create a copy of each token you control. If an artifact token would be created this way, create two of those tokens instead.