You need to be careful with your triggers on this one, as you want to make sure that the Cactuars 10,000 Needles resolves before the Mage Slayers does, otherwise, youre just dealing one measly point of damage
It doesnt, depending on the abilitys wording
Note that each player chooses creatures they don't control, meaning each player (other than one) could decide to blow up a specific player's creatures , making this a one-sided board wipe
Because they all give you creatures as well later on, they have strong value
So we're going to examine the best Merfolk kindred commanders that Magic has to offer and see which may be right for you
Even If you're just using it as a "budget" Ponder, as long as it does the job you want it to, i think youre Pauper-Brainstorming just fine