Ajani, Nacatl Pariah giving you two creatures for 2 mana is already pretty solid, and I appreciate that transforming this card is both easy and flavorful
If you combine Avacyn with other on-board game pieces, like Ghostly Prison, Soul Snare, Chaos Wand, or Maze of Ith
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The biggest downside is that its frail to artifact removal, the Vandalblasts of this world
Mishras Bauble is a staple in any Cube supporting cards with delirium and/or Lurrus of the Dream-Den, and it carries its weight well with the odd revolt and threshold card as well
This is the kind of land that just silently wins games repeatedly putting +1/+1 counters on token armies until your board becomes overwhelming