Diabolist of Tombs, Negromode (G-CHB03/024EN) [Rummy Labyrinth Under the Moonlight]

[G guardian] (Usable when both fighters' vanguards are grade 3 or greater, and the number of face up G guardians in your G zone is 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]: [Soul Blast (1)] When this unit is placed on (GC), if the number of cards in your drop zone is five or more, you may pay the cost. If you do, until end of that battle, this unit gets [Shield]+5000, then, if there are ten or more, this unit gets [Shield]+5000, and then, if there are fifteen or more, this unit gets [Shield]+5000.