Zexal series, Yumas signature monster, Utopia, acquired several different forms, each created to help its owner in specific scenarios
It even lets Lazav, the Multifarious transform into a Phyrexian Dreadnaught
However, "Number C88: Gimmick Puppet Disaster Leo" cannot be Xyz Summoned normally, as its Summoning condition demands it to be Special Summoned by a "Rank-Up-Magic" card targeting "Number 88: Gimmick Puppet of Leo" (Special Summons via "Rank-Up-Magic" cards always being treated as Xyz Summons)
Being Level 5 LIGHT also enabled it to go into powerful Rank 5 monsters such as Constellar Pleiades
It can be a political tool, or at least an invitation to the rest of the table to act opportunistically
One card giving you the option of a second copy of your best creature late in the game versus a land early is absurd enough that this often makes the cut in my blue deck regardless of whether my strategy cares about clones