[CONT]: Sentinel (You may only have up to four cards with "[CONT]: Sentinel" in a deck) [AUTO]:[Choose a «Spike Brothers» 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 «Spike Brothers», and that unit cannot be hit until end of that battle.
(BT02): Spike Brothers! Go! Fight! Win! (BT10): S-P-I-K-E! We are Spike Brothers!