Haven of the Spirit Dragon is another staple, helping to cast your dragons and letting you bring back fallen dragons or even an Ugin if the game drags on
Great Encounters The Great Encounters set card count: 106 Numbered cards 102 Reverse holo cards 11 Variant cards A Great Encounters set counts 219 different pokemon cards
The kicker is that it literally has kicker, letting you pay one and a red, one and a green, or both to have it enter the battlefield with two or four +1/+1 counters on it, raising the cost but also growing its size to allow you to steal bigger things
Cards will hit the battlefield and the idea will resonate
Maximize Your Tribe Generally speaking (and I'll get into a couple exceptions later), if you're going to be playing a ton of cards to make your tribe work, you should make sure you maximize the strong parts of your deck: the tribal parts
Im on the fringes of it (I dont collect/play anything but exactly Oops, but several of my friends are into it), but cards like Wandering Emperor exist, as does the entire Kamigawa set