Knights of day and night

Daytime change (The effects of this card change as
shown below depending on if it is daytime or nighttime.
When this card enters the battlefield if it is daytime
change it to nighttime and vice versa. If it is neither it
becomes daytime).
At the beginning of your upkeep:
•Daytime: Create a 3/1 red spirit knight creature
token if this ability was not used on your last turn.
•Nighttime: Create a 1/3 blue spirit knight
creature token if this ability was not used on your
last