but permanently burrow the permanent is like destroying it (but it ocupies a useful place). The intention of the card is, as I said, to represent the burrowing of treasures done by pirates.
I personaly think that it has more uses this way. In other words: if you use it to your opponent it spends one turn unburrowing and the perm is useless for that turn.
If I understand you well, you say that the opponent will not be able to unburrow it.
Is a very different mechanic and sure the cost will need to be increased.
