He seems to have the making of some kind of red voltron commander deck where you just lay a ton of stuff on him so he can finish off opponents all at once
Madness makes Emrakul go to exile rather than the graveyard, the madness trigger goes onto the stack, and when it resolves, you have the opportunity to pay the alternative cost right away if you want to cast it, else our Eldrazi friend will be moved from exile to the graveyard (as if it had been discarded normally)
Other creatures reap the benefits of spellcasting without actually needing to be the target of said spells
Show and Tell has found plenty of friends in Legacy like Omniscience and Emrakul, the Aeons Torn, and it's just generally strong
Pillar Analysis: A perfect fusion of Legendary Power (Power 9), Alpha Scarcity , and flawless Pristine Condition (PSA 10), amplified by the History of being the first Magic card to publicly break the half-million-dollar barrier
this means it can be anywhere from virtual to actual card advantage, depending on the context
