When combined with cards that allow you to play additional lands on your turn plus landfall cards, this nifty little nonbasic can serve as an unheralded hero of such strategies
But it serves the same purpose, really
However, unlike things like Fable of the Mirror-Breaker, my dishonourable mention for the year, Boseiju is an answer, rather than a threat
For example, you might have a Goblin tribal deck or a Beast tribal deck
Most won't block shadow, fear, intimidate, and more except for Wall of Tanglecord being given reach and an artifact body for fear
It arrives to the battlefield as a 12/12 with Doubling Season, and then one mana and pull off makes two flying counters, and one mana and pull off gives this two back, so it'll grow by +1/+1 each iteration, and is an infinite combo with any color or no of mana