Teething Wurmlet 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

This creature has deathtouch as long as you control three or more artifacts. Whenever an artifact you control enters, you gain 1 life. If this is the first time this ability has resolved this turn, put a +1/+1 counter on this creature.

Complete guide

Teething Wurmlet is a deceptively powerful one-drop that grows alongside your artifact collection. This little Wurm rewards you for building your board, providing both a life buffer and a scaling threat that eventually gains deathtouch. It is a cornerstone for green-based artifact decks that want to maintain pressure while stabilizing their life total.

Artifact Synergy and Scaling

Teething Wurmlet has a static ability and a triggered ability. First, it gains deathtouch as long as you control three or more artifacts, making it a dangerous blocker even if it hasn't grown large yet. Second, whenever an artifact enters the battlefield under your control, you gain 1 life. If that resolution is the first time the ability has resolved in a single turn, Teething Wurmlet also receives a +1/+1 counter.

Resolution Step by Step

When an artifact enters the battlefield, the triggered ability goes on the stack. Upon resolution, you will always gain 1 life. The game then checks if this specific instance of the ability is the first one to resolve this turn. If it is, the +1/+1 counter is placed. If you play a second or third artifact in the same turn, the ability triggers again, but you will only receive the 1 life benefit, not additional counters.

Strategic Timing

To maximize Teething Wurmlet, aim to play at least one artifact every turn rather than dumping your hand at once. Since the +1/+1 counter is limited to once per turn, spreading out your artifact plays ensures the Wurmlet grows as fast as possible. Remember that the deathtouch check is constant; if an artifact is destroyed and you drop below three, the Wurmlet loses deathtouch immediately.

Common Mistakes

A frequent error is assuming that multiple artifacts entering at the same time (such as through a mass recursion spell) will grant multiple counters. While each artifact will trigger the gain life effect, only the first trigger to resolve will grant the +1/+1 counter. Additionally, remember that the artifact count for deathtouch includes artifact creatures and artifact tokens like Food or Treasure.

Interaction examples

Early Growth and Mana Fixing

Birds of Paradise

On turn one, you play Teething Wurmlet. On turn two, you play Birds of Paradise to fix your mana. While Birds of Paradise provides the Green mana needed for the Wurmlet, it is not an artifact, so no life is gained and no counters are placed. You will need to follow up with an artifact to begin growing the Wurmlet.

Turn One Wurmlet into Elves

Llanowar Elves

You deploy Teething Wurmlet. On the following turn, you cast Llanowar Elves. Because Llanowar Elves is a Creature — Elf Druid and not an artifact, the Wurmlet's ability does not trigger. This highlights the importance of including artifacts like Mox Amber or Ornithopter in your deck to ensure the Wurmlet triggers consistently.

Solo Progression

If you control Teething Wurmlet and cast an artifact, you gain 1 life and put a +1/+1 counter on it. If you then cast a second artifact in the same turn, you gain 1 life, but no additional +1/+1 counter is added because the ability has already resolved once that turn.

Guide written with AI from the official text and rulings. Official English text prevails.