You choose how many targets Armament Dragon's triggered ability has and how the counters are distributed as you put the ability onto the stack
In this case, the daytime Litten is preferred since the it does 10 recoil damage to itself on using its move
Once you cast one, it gets exiled and then lets you cast a copy of it for free at the start of future turns
image429599 99.4 KB image429599 58.7 KB edit: here are two more examples from each in a different habitat image429599 88 KB image429599 90.1 KB 13 Likes zork April 7, 2023, 3:41am 4 Bookmarked for when I continue my Nishida collection But sir I beg you you must add the ethereal, majestic Light Arcanine 3 Likes Dyl April 7, 2023, 4:38am 5 Right
To go back to Fenrir for a second, lets evaluate the card in terms of card economy: Fenrir replaces itself on ETB with a land, putting you at card parity