Charon's initial skill is lifted from Steam Breath Dragon of Generation Stride. By revealing a grade 3 from your hand when Charon is called, you can search your deck for a grade 3 unit with "Blaster Dark" in its card name. You're then required to discard a card from hand to make the exchange neutral, but this doesn't have to be either of the grade 3s the skill involved. Several aspects of Charon have been prepatched to avoid exploitation. The first aspect is that Charon's on-call skill only works when called from the hand, so superior calling him with Dark Night Maiden Macha or Claret Sword Dragon won't work. The second is that because Charon only searches for grade 3 Blaster Darks, you can't search out Blaster Dark, Dark Revenger or Dark Revenger “Abyss.” Hence it's not possible to bypass grade 2 gradelock with Charon. His continuous skill allows Charon to be used as two rearguards to support the cost of a retire skill; this skill is almost identical to that of Cutting-Edge Knight David, but instead of being a generation break, Charon requires a Blaster vanguard to function.
Aurageyser Dragon that does not have Blaster in its name, as long as the heart card of the stride is a Blaster unit, Charon may be used for the cost of those skills. Likewise, if your heart is not a Blaster unit but your stride is Phantom Blaster “Diablo,” Charon's skill will still be live.
Phantom Blaster's breakride remake from the upcoming G-BT03: Sovereign Star Dragon also requires a retire 3 cost for its breakride skill, and Charon is a practical necessity in the deck to mitigate the heavy cost of putting down four or more cards during the break ride turn.
Be mindful of Charon's role compared to other support options. It's certainly true that one could run a unit like Black-winged Swordbreaker or Darkbond Trumpeter to draw or superior call for card advantage, and then retire those units for an exchange that is functionally identical to retiring Charon. However, Charon does not have a cost attached to him, and compared to using Swordbreaker consolidates cards on the field rather than in the hand. Depending on the situation, standard draw and call support may be more desirable, as having occupied rearguard circles can be a disadvantage versus “The X,” Gear Chronicle and Link Joker decks; but having unoccupied rearguard circles can be even more dangerous versus the popular “Diablo” matchups, Heroic Saga Dragon and Narukami. It's best to use the Pitch Black Sage judiciously, adjusting your play based on the opposition. Charon can support a variety of divergently-envisioned Blaster decks, and will likely remain a staple for Shadow Paladin cardfighters for several formats to come. G-Legend Deck 01: The Dark “Ren Suzugamori,” will hit international shelves on June 19th, 2015.
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