[Digivolve] Lv.2 w/[TS] trait: Cost 0
[Start of Your Main Phase] If you have 4 or less memory, this Digimon may digivolve into a Digimon card with the [Fallen Angel] or [TS] trait in the hand without paying the cost.
Inherited Effect
[When Attacking] [Once Per Turn] <Draw 1> and trash 1 card in your hand.
Rulings Q&A — 1 entries
Q1Q5762
What position on the memory gauge does "while you have 4 or less memory" refer to?
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Official Ruling
It refers to when the memory gauge is at 4 or further to the right on your side.