Whenever your dragons hit an opponent, you get to cheat a permanent into play for free and it doesnt even have to be a dragon
This guy made blue control decks virtually unplayable for a full year in Standard, until Tsabo's Decree finally saw print, mainly as a hoser for the Rebel deck fuelled by the Sergeant
If it is both an enchantment creature and a legendary creature, you still only put one +1/+1 counter on it and it gets +1/+1 until end of turn
With Viridian Shaman type creatures you have to hold them back based on the game state to get any real value from them and with cards like Qasali Pridemage which can be more proactive you have to lose the dork in order to use it as removal
(2023-06-16) Amass Zombies works the same way, except you create a 0/0 black Zombie Army creature token if you don't control an Army
Capitalize on powerful card selection whenever you ninjutsu to keep your hand stocked and your board terrifying