Szats Will is an excellent choice for Squirrel Tribal as it can either work as a mini mass removal (but important as it makes each opponent sacrifice the creature with the greatest power), or as a mass graveyard hate (affecting only opponents) with token synergy
This price tag isnt at all surprising considering its hugely popular in Commander and even sees Legacy play
While less a payoff for frogs and more a frog thats a payoff for the format, Rampant Frogantua gets bigger and bigger as the game goes on
They're both Green, they both cost five mana, they both mutate for six mana, they're both beasts, they're both 6/6, and they both put permanents onto the battlefield from the top of your deck
That hybrid strategy is often better than pure sealed opening or pure singles buying
6 Eldritch Evolution Those tentacles are an improvement, honestly