Use Attunement to fill the graveyard with enchantments, bring them all back into play with one fell swoop using Replenish, and have one of them be Opalescence so you can attack for twenty the following turn
The ability won't affect those spells and it won't affect spells that those players cast before you activated it
Ranking: Want To Build Zurgo, Thunders Decree My first impression of this Zurgo was not great
In the best case this means a price tag of between $2 and $3
Forced Adaptation and Ring of Kalonia, for example, are relevant card types that also put +1/+1 counters on Kosei
Effects that modify a creature's power and/or toughness, such as the effect of Appeal to Eirdu, will apply to the creature no matter when they started to take effect