Tuvasa the Sunlit gets +1/+1 for each enchantment you control.
Whenever you cast your first enchantment spell each turn, draw a card.
Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to Tuvasa may become lethal if some of your enchantments leave the battlefield during that turn.
Tuvasa’s triggered ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.