I think counter doublers are double the fun indeed, and its a fun theme to build an EDH deck around, be it Simic Vorel of the Hull Clade, or a mono-green Vorinclex, Monstrous Raider deck
In an event that is still debated by scholars, Montezuma was killed
In this case, you'll create a 0/0 white Spirit creature token, which will likely immediately die unless something else is raising its toughness
The ability to cast it at any time while interacting with the board or temporarily countering a spell gives you a lot of available plays
Trust me, this saves a lot of time and relieves a lot of frustration when you have to add to, delete from, or edit your collection
Granted, that last part isnt very traditional Father Christmas, but his ability fits quite well