As such, the set features another hallmark of the series: Chocobos
If tapping a creature using convoke wouldn't pay for any mana in that spell's cost (because you've already paid for all of the mana in the spell's cost by tapping other creatures or because you've already paid for all of the generic mana in the cost by tapping other creatures and the creature you want to tap doesn't share a color with any of the remaining mana symbols in the spell's cost), you can't use convoke to tap that creature
Suitable for collectors and trading card game players
These spells are all about efficiency, flexibility, and catching opponents off guard at the most critical moments
Siege Rhino Oh, lookie lookie, the old big baddie of Standard doesnt get the job done anymore
This often means that nowadays, the most powerful cards for non-rotating formats are printed in a supplemental set (rather than in Standard)