[CONT]:
Sentinel
(You may only have up to four cards with "[CONT]: Sentinel" in a deck)
[AUTO]:[Choose a «
Oracle Think Tank
» from your hand, and discard it] When this unit is placed on (GC), you may pay the cost. If you do, choose one of your «
Oracle Think Tank
» that is being attacked, and that unit cannot be hit until end of that battle.