Clearskies Dragon, Lightleads Dragon: D Booster Set 13: Flight of Chakrabarthi

[CONT](RC):If you have a unit with "Alden" in its card name, this unit gets "Boost". [AUTO](RC):At the end of the battle this unit attacked or boosted, COST [put another rear-guard in the same column as this unit into soul], choose one of your units with "Alden" in its card name, and it gets [Power]+10000 until end of turn.