You just need creatures in play, and you dont need +1/+1 counter synergies this time, though 4+ power creatures for ferocious help
Thats why I will try building and presenting a series of decks for all those who share the love for tribal decks
Agyrem Plane - Ravnica Whenever a white creature dies, return it to the battlefield under its owner's control at the beginning of the next end step
But you know what this has, in addition to size that they don't have
That said, there are a lot of Magic: The Gathering cards that could help make a powerful Y'shtola deck if you are looking for a deck to upgrade instead of one to play as is
Compared to the randomised nature of booster packs, with a MTG box set you know exactly what you're getting inside - it's a fixed collection of cards, often themed around a particular plane or style