I used [BT16-024 MagnaAngemon]'s [On Play] [When Digivolving] effect to digivolve into this card, then I placed a card from my hand at the bottom of my security stack. At such times, does this card's [On Play] [When Digivolving] effect or its [All Turns] effect activate first?
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Official Ruling
The effects trigger simultaneously, so the player chooses the activation order.