If a conquering unit became mighty on the conquer of Sunken Temple, can you still trigger the draw effect?
No, you cannot trigger the draw effect of Sunken Temple if your unit only becomes Mighty after the conquer has already occurred.
According to the official rulings for Sunken Temple:
- Trigger Condition: Sunken Temple's ability is a triggered ability that checks for a Mighty unit at the moment you conquer.
- Timing: The unit must be Mighty at the exact moment the conquer happens for the ability to trigger. If a unit receives a buff after the conquer (such as from another card's effect that triggers upon conquering), it is too late to satisfy the condition for Sunken Temple.
As stated in the FAQ: "Even if you receive a buff after the conquer (from another card's effect), it is too late to satisfy the condition for Sunken Temple. The unit must be Mighty at the exact moment the conquer happens for the ability to trigger."