If I have multiple Void Hatchlings in play and an effect reveals the top card of my deck, do all the Void Hatchlings trigger separately? Specifically, if Undertitan is on top, would revealing it multiple times via multiple Hatchlings generate energy each time?

Ruling: Void Hatchling is a replacement effect, not a triggered ability. You only replace the reveal action once, regardless of how many Void Hatchlings you have in play.

Nuances:

• Even if multiple Hatchlings could apply, you would only reveal the card once total, not once per Hatchling
• The card text may be clarified in future rules updates to include clearer replacement effect language like "instead"
• This ruling is based on current comprehensive rules interpretation, subject to change when these cards officially release