All that's left to do is get started
The value of X is calculated only once, as Prismatic Undercurrents's first ability resolves
However, the large black sphere does not have a single attack decision (...) The entire attack is judged only at the moment of explosion, but right before it explodes, the sphere turns white and shows 'I'm going to explode', so dodging timing is very easy
Fated Clash Final Showdown Flawless Maneuver Frontline Medic Gavony Gideon's Phalanx Gideon, Ally of Zendikar Gideon, Martial Paragon Grand Crescendo Gyome, Master Chef Hajar, Loyal Bodyguard Hakoda, Selfless Commander Hero of Goma Fada Hour of Devastation Inspiring Call Join Shields Kamahl's Will Kamahl, Heart of Krosa Karfell Kennel-Master King Darien XLVIII Kytheon, Hero of Akros Last Night Together Lena, Selfless Champion Lightshield Array Linvala, Shield of Sea Gate Localized Destruction Lorehold Command Majestic Myriarch Make a Stand Moogles' Valor Myojin of Towering Might Necron Monolith Nylea, God of the Hunt Odric, Lunarch Marshal Purphoros, God of the Forge Ready // Willing Resistance Reunited Roar of Challenge
Thats not what this card is at all, though, and the unfortunate reality is that Bone Dragon is simply too underpowered to be anything more than a Limited bomb
