You can expect the ability of citric acid that prevents damage.
[CONT]: Sentinel
[AUTO]:[Counter Blast (1)] When this unit is placed on (GC) from hand during the battle that your vanguard was attacked, you may pay the cost. If you do, call five cards from the top of your deck to (GC).
[AUTO]:[Choose a card from your drop zone, and put it on the bottom of your deck] When this unit is placed on (GC), you may pay the cost. If you do, choose one of your other guardians, if you have another unit with the same card name as that unit, call two cards from the top of your deck to (GC).