Karmic Guide #90
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Card Details
Flying, protection from black
Echo 
When this creature enters, return target creature card from your graveyard to the battlefield.
2/2
Illustrated by Allen Williams
Rulings (2)
Jun 18, 2021
Paying for echo is always optional. When the echo triggered ability resolves, if you can't pay the echo cost or choose not to, you sacrifice that permanent.
Jun 18, 2021
Your permanent's echo ability will trigger at the beginning of your upkeep if it entered the battlefield since the beginning of your last upkeep, or if you gained control of it since the beginning of your last upkeep.
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