Given how many cards there are that either want to die, or that make sacrificial Thopters or Servos, this cost isnt really a drawback at all, and being able to cheat in one of the big old Creatures from earlier in the list, or even something like Darksteel Forge, which gives all of your Artifacts indestructible, losing three of anything is always worth it
Impostor of the Sixth Pride
It is still usually worth playing in these decks if you have some triggers for it and red mana
Zur the Enchanter Azami, Lady of Scrolls Azami, Lady of Scrolls aims to bury opponents in overwhelming card advantage with a side dish of infinite mana
Can't find some of the suggested land-searching cards
It is not perfectly symmetrical but at a long distance that is near impossible to tell, the result is a sort uneasy foreboding that something is not quite right with the piece