Zimone rewards fetch lands, extra land drops, bounce lands, and effects like Growth Spiral, Harrow, and Cultivate
Like a lot of the other cool, iconic legends in the set, 6 mana is a lot, but being able to flip this guy into a 9/9 that fights a creature, gives you a ton of mana, and eventually turns back into Clive rather than dying, could make it all worth it
Rakdos has so many good ways to inflict pain
Yes, it is slightly more awkward to cast but you really should be able to fire it off before you have lost all 20 of your starting life
Indeed, it is nowadays very easy for a new company to buy "ready to use" slabs
But being able to Sync into this during my opponent's turn when things look grim is pretty cool