MScore: 8.8/10
Crucible of the Spirit Dragon
Landrare
: Add 
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, : Put a storage counter on this land.
, Remove X storage counters from this land: Add X mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons.
Illustrated by Jung Park · Fate Reforged · #167
Rulings for Crucible of the Spirit Dragon
4
2014-11-24
You can use mana generated by the last ability to pay an alternative cost (such as a dash cost) or an additional cost to cast a Dragon spell. It's not limited to paying just that spell's mana cost.
2014-11-24
An activated ability appears in the form “Cost: Effect.”
2014-11-24
Notably, turning a face-down creature face up isn't an activated ability. If you manifest a Dragon creature card or cast a Dragon creature card face down using the morph ability, you can't use mana generated by the last ability to turn that card face up.
2014-11-24
The mana generated by the last ability can't be spent to activate abilities of Dragon sources that aren't on the battlefield.
and/or 
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and/or 
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