Grandmother Fa Spirited Elder is better than Thumper Young Bunny, but her ability is quite obvious and can be avoided
If Fecund Greenshell's second ability stops applying (because Fecund Greenshell leaves the battlefield or loses its abilities or because you no longer control ten or more lands), then any creatures that needed the toughness bonus to stay alive will die
Clique is top five in blue monsters in the cube, sadly faeries is not a powerful archetype lacking sufficient depth in quality of cards like this to fill out a singleton deck
Honorable Menton #3
Spymaster's Vault has a similar trick, where you can activate Verminister, then activate the Vault to connive away extra Rat Colonies
Like most versions of the character, Gideon, Ally of Zendikar can become an indestructible creature to fight in person, and it can use its 0 ability to make a 2/2 Knight Ally without losing loyalty