Anyway, Sinkholes ability to disrupt peoples mana before they can really even get their game going is good enough for Legacy and would be seriously problematic if the card was ever legal in Modern, let alone Standard
Thoughtseize Thoughtseize is the most played discard spell because it costs a single mana and the effect is unconditional, unlike its brethren Duress and Inquisition of Kozilek
Dusk Rose Reliquary You need some sacrifice fodder to make Dusk Rose Reliquary work, but thats a small cost to pay to exile something for 1 mana
The draft environment is all about playing to the board, so you need to prioritize good creatures and better removal
When your opponents are Lava Spiking you, those are the moments you really appreciate Inquisition of Kozilek
In any case, this will be great news for Square Enix too, and could potentially pave the way for more crossovers in the future