You can use cards like these to maximize these tokens sticking around: Cadric, Soul Kindler Kiki-Jiki, Mirror Breaker Feldon of the Third Path 4 Neriv, Heart Of The Storm Dont Be Hasty A cheaper Dragon with a powerful effect, Neriv, Heart of the Storm is a Mardu commander that has a strong haste-themed effect
I suppose you might think of this list this way: if someone else has them on the battlefield, are you likely to want to get rid of them
A coded system that relies on obscure symbols might be advertised as being impossible for your spectators to figure out
Legendary Planeswalker - Kiora Kiora, the Crashing Wave +1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls
Godo, Bandit Warlord Godo, Bandit Warlord is best known for its ability to end games by itself in conjunction with Helm of the Host, to the point where even cEDH decks are built to revolve around this combo