Sometimes even humble forest creatures were gifted with mighty emanations from the past.

Might of Old Krosa

Target creature gets +2/+2 until end of turn. If you cast this spell during your main phase, that creature gets +4/+4 until end of turn instead.

The List

"Krosa the great. Krosa the enduring. Look to the forest, and it will share its bounty."
—Zyd, Kamahlite druid

Double Masters 2022

Time Spiral Remastered

Modern Masters 2017

Time Spiral

Target creature gets +2/+2 until end of turn. If you played this spell during your main phase, that creature gets +4/+4 until end of turn instead.

If an effect copies Might of Old Krosa while it's on the stack, the copy will give the creature only +2/+2, even if the original spell was cast during your main phase. This is because the copy is created on the stack and wasn't cast at all.