When a player casts a spell, they describe the effects they would like it to have. Nothing is impossible. As a spell is described, the GM will produce a DC for it, and decide which discipline(s) it falls under. When the DC is exceeded by five points or more, the spell costs no Capacity. If you exceed by fewer than five, the spell costs the difference in Capacity. For example, if the DC for a spell is 25 and you roll a 30, the spell costs nothing, whereas if you roll a 27, it costs three Capacity. If you succeed in casting a spell but do not have sufficient capacity to cast it, the cost is deducted as 4 times the difference in HP (usually).

When a player casts a spell, they describe the effects they would like it to have. Nothing is impossible. As a spell is described, the GM will produce a DC for it, and decide which discipline(s) it falls under. When the DC is exceeded by five points or more, the spell costs no Capacity. If you exceed by fewer than five, the spell costs the difference in Capacity. For example, if the DC for a spell is 25 and you roll a 30, the spell costs nothing, whereas if you roll a 27, it costs three Capacity. If you succeed in casting a spell but do not have sufficient capacity to cast it, the cost is deducted as 4 times the difference in HP (usually).