Each artifact of yours that comes into play under your control gives the Cannoneer a +1/+1 counter and makes the turtle unblockable for the turn
Otherwise, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle. In essence, this is a ramp spell that can also be used to destroy problematic artifacts or enchantments, and thats a really interesting bit of design, and well worth picking up for your decks
While white has other token generators that are also sagas, particularly in current Standard, the sequence of token batches over multiple turns uniquely captures the progressive nature of the summon's animation, rather than creating them all at once
Marill McDonalds Promo CGS 9
Plenty of top tier strategies, including Izzet Cauldron and Dimir Midrange, consistently play three or four copies of this land