Theyre often hard to remove from the board, and if they resolve, it can end the game in a heartbeat
Reach Whenever The Dawning Archaic attacks, you may cast target instant or sorcery card from your graveyard without paying its mana cost
If you could reliably cast this off of a Mountain, a Forest, and a Swamp, that would be great, but that's not an option
It can eventually become a win condition of sorts, but Sanctum of Stone Fangs and Honden of Infinite Rage do the same thing a lot more efficiently
While casting a spell without paying its mana cost using the last ability, you can't pay alternative costs, but you may choose to pay any optional additional costs the spell may have (such as a kicker cost)
Qala, Ajani's Pridemate I'm guessing the existence of Qala, Ajani's Pridemate is poking fun at the fact that there's a subset of people who absolutely love Ajani's Pridemate