Suppose you have an Elite Shrieker with Blessing. It will be a 13/7 (10/4 + 3/3). If you burrow it it's attack will be cut in half rounded down. So 6 attack. So far everything Is fine, but If you unburrow it it will not go back to 13 attack, it will, instead, go up to 12 attack. I hope this is not intended. Because if it is. You will find a discrepancy between a shrieker who has been given two blessings (+6/+6) and has not burrowed in between, and who has burrowed in between. One will be 15/10 and the other will be 16/10.