Ronin's Path

Enchant creature
Enchanted creature gets +2/+2, vigilance, and is a Human Samurai in addition to its other types.
When Ronin's Path enters the battlefield, all non-Human creatures get -X/-X until end of turn, being X the power of enchanted creature.
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"Once the will is controlled, the spirit is strengthened, however, it is acceptable if neither spirit you have more"-Kits-Morai