Scrap-Iron Scarecrow is a versatile card that can benefit control or stalling decks by providing a way to negate attacks and potentially disrupt the opponent's strategy
If I had a Magic card signed by someone famous, I wouldnt be interested in letting it go either
Tristan is a great friend who would do anything to support the people he cares about
until you realize you can just keep putting the bounced Pokmon back into play and chip away at Pidgeot's health while it fails to rack up damage
Sephiroth, Fallen Hero sets your modified creatures to beefy 7/5s at base when he swings, which is fantastic if you manage to go wide
That said, unless you are planning on opening a lot of boxes (to help even out variance), I'd probably plan on getting the non- Masterpiece value and treat the possibility of opening a super-sweet, super-expensive Invocation as a bonus lottery ticket that you get for free when buying a box of Amonkhet