Kyrstron, Lair Delver/Tips


 * If you have Billion-Degree Dragon in your hand and Kyrstron, Lair Delver, use Kyrstron, Lair Delver to attack any tapped creatures, when it is destroyed you may put Billion-Degree Dragon directly into the battle zone without paying its cost. (It doesn't matter if it gets blocked, it would be destroyed anyway so you can put Billion-Degree Dragon directly in the battle zone.)


 * Also try this with other strong dragons you wish to put in the battle zone, like Überdragon Bajula or dragons with high mana cost.