Dwarven Lightsmith

Dwarven Lightsmith’s ability affects only creatures your team controls at the time it resolves. Creatures that come under your team’s control later in the turn won’t get +1/+1.

If an effect allows a player to cast a spell spending mana “as though it were mana of any color” or “of any type,” that player must still pay for the colored mana in that spell’s total cost. That cost doesn’t become generic.

Assist allows another player to pay for any amount of generic mana. If an effect changes the cost of the spell, the amount that player may pay will be more or less than the amount in the spell’s reminder text.