For permanent spells, that happens when the gift triggered ability resolves
At some point, the fetchlands we have to add are a little worse than the ones first ones we were playing, (Marsh Flats isnt as good as Bloodstained Mire in Grixis Deaths Shadow) and we might even need to add one more fetchable land to make sure that our lands do what we want
Play Boosters may include: TLA 1358
Its also a good creature as a 3/5 with deathtouch and lifelink, which is a creature that stands on its own, but its vulnerable to a large amount of creature removal
If you add a Haste enabler, like Concordant Crossroads, into the mix, Enduring Vitality, Cryptolith Rites, and Springleaf Parade all go infinite with The Unbeatable Squirrel Girl
Its easy enough to get the first four counters on there, and if you can stick it until this spirit cleric becomes a 12/12 vigilant flier youre really in business