magnetic booster box case RIXUGIT 10-Pack One Touch Booster-Pack Magnetic-Holders Featuring a magnetic top closure and 6mm thick acrylic Uv Protection Card Case 3

Before "Dragon Lady" attacks, Vivian activates "Flying Dragon Whirl" to target her "Dragon Lady" and send four Dragon-Type monsters ("Pitch-Dark Dragon", "Blackland Fire Dragon", "Kiryu" and "Sky Dragon") from her Deck to the Graveyard in order to increase the ATK of "Dragon Lady" by 300 for each Dragon-type monster sent this way ("Dragon Lady": 1400 2600/2100)

Patented Modular Design: Create your own customized MTG commander deck box system with 360 connecting Nexus deck blocks

But generally speaking it benefits you by letting you draw cards, and lets you discard your enemys entire hand

As Dragon Ruler relies heavily on Special Summoning their Level 7 Dragon Rulers to make plays, Crimson Blader is extremely critical in the mirror match and getting its effect off would cause the opponent to have no plays for their next turn