Question Coin rain

[Idiot]

Hi. I'm new to this game.
My monthly challenge is requesting I do 3 coin rain.
What is it and how do i do this please?

 

[m4rt1n]

Hi, you can find Coin Rain in the spells inventory under the instants tab.

They can be used from there to replenish your coins.

They are gained from crafting, the spire or won in events.