Knight of Light

This card can only be played the turn after you've
casted a Light type creature, and is treated as only
a Night type while in your hand. Haste. This card
gains +1/+1 for every Night type on the field.
Once per turn, if this card would leave the field,
you may return it to the field, tap it, and draw a
card, this effect cannot be activated at the
beginning of your upkeep. You may only cast
Light creature cards the turn after this card
comes into play. At the beginning of the upkeep
after you play