Its an excellent buff on an infect creature because theyll have to deal with it and you cash the creature in for a card
Both Slug and Scorpion continue to remain as creature types and they survived the Great Creature Type Update, which I extremely appreciate
I can tell you I lost a tight game to Temur in the Swiss (game but not match) to not having the Dragon, despite having double-digit Dragons in my deck and sideboard
In that case, the first player in turn order makes their choice and the action for that choice is performed before the next player makes their choice
Why This Matters You're probably wondering why this matters, and the truth is that if you are playing split cards "fairly" (i.e., just casting them normally from your hand), you won't even notice this rules change
Sac a token and Myr Battlesphere to get 4 mana for Nims Deathmantle