To solve this, I used a bit of brute force
Whenever a creature an opponent controls enters, you may have that player lose 1 life
"Putting the Un in Fun"
The only downside is you wont get another two copies from Saheelis' copy ability, as this makes token copies, and due to Gruff Triplets wording, you dont get more
In total, 11 new Final Fantasy MTG cards can be a deck's commander, and they are: Garland, Royal Kidnapper The Destined Warrior The Destined White Mage The Destined Thief The Destined Black Mage Edea, Possessed Sorcerer Rinoa, Angel Wing Seifer, Balamb Rival Squall, Gunblade Duelist Amarant Coral Noctis, Heir Apparent Of these, the strongest is Noctis, Heir Apparent, and while the other cards do have their merits, the iconic FF15 character packs a big punch thanks to its ability to blink mid-combat and give benefits to other creatures that can achieve something similar
It doesnt have the tempo loss of many land destruction spells and effects