Trial of Will

Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell)
Counter target spell unless its controller pays {x}, where X is the amount of {u} spent to cast
Trial of Will. Target spell is still countered unless
its controller takes X damage from Trial of Will,
where X is the amount of {r} spent to cast Trial
of Will. Target spell is still countered unless its controller allows you to gain X life, where X is
the amount of {w} spent to cast Trial of Will.