Doubling Season - Ravnica: City of Guilds - 158

Enchantment

Mana Cost: {4}{G}

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Rare · Ravnica: City of Guilds · #158 (RAV)

Illustrated by Wayne Reynolds