one piece card game welcome pack - Issho - Vol.1 - #OP05-042 and Classification ONE PIECE CARD GAME Official

The activated ability is quite a mana sink, but does the job well, buying time when youre behind and potentially getting you over the finish line as well

Another reason to sideboard out Thoughtseize is if no specific card matters

When you do, cast it for its madness cost or put it into your graveyard.) Enchantment Discard (CTRL to add secondary) Draw Ancestral Knowledge Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) When this enchantment enters, look at the top ten cards of your library, then exile any number of them and put the rest back on top of your library in any order

And so on and so forth