When you get this down early, it will feel pretty nice
Along with that, whenever you put a counter on Weatherlight Compleated you get to scry 1 - look at the top card of your library, then place it on the top or bottom of the deck - until you have seven or more counters on the card
Even if it is in the Marvel deck it still settles in at a couple of bucks
All of the effects that trigger when lands enter the battlefield are fantastic, so making them essentially a two-for-one is great, especially since you can double up on effects multiple times in one turn
For three mana, you get a 1/3 that makes it so that whenever you gain life, you can have an opponent lose that much life
Use the mana value of the legendary creature that died as it last existed on the battlefield to determine what may be targeted with Havi's last ability