Your hand, graveyard, and library are still very much in the game (more on that later) and these cards will work as normal because you arent protected from effects such as these
How many Pack Points does it cost to craft Whimsicott
(Treat phased-out creatures and anything attached to them as though they don't exist until their controller's next turn.) Instant Swiftfoot Boots Equipped creature has hexproof and haste
Palace Jailer allows you to get Monarch status, while also removing a creature your opponent controls, giving a player the ability to kill a creature, exile an opponents creature (until they become monarch themselves), and net themselves a card draw, all with only two mana invested
The sweet spot is probably around 5 mana so that you can have two creatures that give your tokens +1/+1 counters, but you can really sink as much mana as you want into that squad ability