Taking into account the mana cost, method of preparation, and potential impact on a game, it feels fair to place Emeritus of Truce in the middle of the pack
We can't aggro them down, so KOing their Characters and weakening their aggression is the main goal
These promo cards are not included in the S8a 25th ANNIVERSARY COLLECTION packs
The first thing that came to mind when I saw this card is how easy it is to hold up mana and use this to grab a powerful land such as Gaeas Cradle at instant speed before your turn
This slot will be a 50% split between having the global Mystical Archive style and the Japanese variant
For collecting, generally yes: Japanese boxes release first and carry the JP-only Manga Rare and God Pack tiers, and Japanese sealed has the stronger track record (OP-13: ~6,000 launch to ~27,000 in about a year historical, not a guarantee)