Retroactive Time Maiden, Uluru (RR)

[G guardian] (Usable when both fighters' vanguards are grade 3 or greater, and the number of face up G guardians in your G zone if three or less)-Opponent Turn's Guard Step-[Choose a card with HEAL from your hand, and discard it] Call this card to your (GC) from face down.
[AUTO]:When this unit is placed on (GC), choose up to one normal unit and trigger unit from your drop zone, and put them on the bottom of your deck in any order. If a total of two cards were put, this unit gets [Shield]+5000 until end of that battle.