Creatures that enter the battlefield or become creatures later in the turn won't get -1/-1 unless the delayed triggered ability triggers and resolves again later
[0]: Until end of turn, Gideon, Martial Paragon becomes a 5/5 Human Soldier creature with indestructible that's still a planeswalker
With each match, themed magic decks let you sharpen your skills, outwit your opponents, and embrace the true spirit of magical battles
This is because, when a battle enters the battlefield, one player (as defined by the battles subtype) is tasked with becoming its protector
At worst, this is a 5 mana, draw multiple cards spell, essentially, assuming you immediately kill it for its -3 ability
Halving Season's abilities won't change the number of tokens you create or counters you place, even if you're placing counters on permanents your opponents control