Most likely, Jester's Mask's user will choose a new hand of unneeded lands and/or weak spells for the opponent, which can set them very far behind
Once during your turn, you may choose 1 of your opponents Benched Pokemon and put 3 damage counters on it
The honest answer is it depends on your expectations, but Arceus' most expensive card reaches the triple digits, so it's certainly no slouch
Among the 39 lands, only ten are nonbasic, so managing your lands when they're on the battlefield is less of a concern
This card can easily turn a game around by making all your creatures effectively unblockable for a turn if youre playing against any color other than black or colorless artifacts
Load up on Blood token generators like Olivias Attendants or Glass-Cast Heart so Strefan always has fuel when its time to swing