More often than not, this will destroy the scariest creature on the board twice and grant you some tokens, which is still a decent card
Naturally, Sisay can get up to a 7/7 thanks to her ability, and with a pump spell or two, theres no stopping you
I do think that there needs to be a change to the system either way though, and I would be willing to entertain any idea that wasnt too impactful to the current overall structure of the game
BLUE Aquatic Incursion The Merfolk of Ixalan block support both a Go Wide theme with tokens and also a +1/+1 counter theme protected by hexproof
There isn't any good direct comparison to Mangara's abilities, but the closest thing that popped into my head is Runic Armasaur, another creature whose card drawing ability is entirely dependent on your opponents' actions, making the card inconsistent where it sometimes draws you zero cards and sometimes floods you with card draw
Those premiums exist at a rate very similar to a normal Magic expansion