Singular Heart, Rurika

[AUTO](RC):When this unit boosts, if you have a vanguard with "Coral" in its card name, choose a card with "Coral" in its card name from your drop, and you may put it into the soul. At the end of that battle, if your soul has four or more cards with "Coral" in their card names, and you did not [Counter-Charge] this turn, [COST][retire this unit], and [Counter-Charge 1].