Doubling Season exists in a Standard format that starts with oil counters and poison counters, but what kind of counters do you think well be doubling by the time this rotates back out
An interesting example in that this is a Xanatos Gambit layered within a Batman Gambit Seto gloats that he knew the Lancastrians would be so desperate once cornered by the Yorkists that they'd turn to Simon to summon the Rose Duelist to their time in the first place.
Compelling Voice: Aileen uses a hypnotic suggestion to freeze Anzu solid, and it's revealed that she also hypnotized anyone who lost to her to make them think they lost whatever's important to them
Play four Persistent Petitioners, and suddenly your opponent needs to mill twelve cards
This giant Ooze could also find a home in Yannik, Scavenging SentinelYannik, Scavenging Sentinel and Nikara, Lair ScavengerNikara, Lair Scavenger Aristocrat decks as another source of +1/+1 counters for your board