There's not a single way you can build Sisay, since there are multiple combo lines you can go for that all will close a game in no time
These can be massive creatures, value-generating planeswalkers, or flashy sorceries from the Mystical Archive
When you add that degree of optionality to a card, it quickly eclipses any of its constituent parts in power level, because it only serves a given purpose when that purpose is relevant to the game
While on the field, this monster will also reduce the ATK of the opponent's monsters for every HERO monster in the GY
, : Exile Clive, then return it to the battlefield transformed under its owner's control
This card is surprisingly on the lower side of the market right now, but it does still stand out as a valuable 151 piece