If a creature you control has riot, you choose for that creature to enter the battlefield with either a +1/+1 counter or haste
Tentpole sets are one of the six main sets released each year, although it hasnt yet been confirmed whether Final Fantasy will be a Standard-legal, or one limited to other formats, like how Lord of the Rings: Tales Of Middle-earth was tied into Modern and Commander
I had this crazy idea what if villains could only challenge heroes and heroes could only challenge villains? Miller says
The last time we saw this mechanic return to a regular set was Coldsnap in 2006
Modern and Legacy: yes, fetches are legal, but some related cards (like Senseis Divining Top) are not
Its also a lot more attractive to casual and Commander players, who go nuts for effects like this