Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) This creature enters with X +1/+1 counters on it.

At the beginning of your upkeep, remove a -1/-1 counter from each creature you control. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

When Yasharn enters, search your library for a basic Forest card and a basic Plains card, reveal those cards, put them into your hand, then shuffle. Players can't pay life or sacrifice nonland permanents to cast spells or activate abilities.

Trample, lifelink Spells you cast that target this creature cost {2} less to cast. Spells your opponents cast that target this creature cost {2} more to cast.

Vigilance

Whenever an opponent casts a spell during your turn and when this creature dies, create a green and white Elemental creature token with "This token's power and toughness are each equal to the number of creatures you control."

Wayfaring Temple's power and toughness are each equal to the number of creatures you control. Whenever this creature deals combat damage to a player, populate. (Create a token that's a copy of a creature token you control.)