Burning-Tree Emissary has made it more tempting to splash but then you don't have to take much of a downgrade on your sex monkey to stay in colour
We have combat damage triggers like Scion of Darkness and Spawning Kraken that will massively push the board to your position that you want to get started
Basic Pokmon cards are easy to put into play, but the higher up you try to go to evolve your Pokmon, the more support you have to put in your deck to make it easier to do
The Thirteenth Doctor might want a particular kind of Simic deck (say, a cascade one) but at three mana, the untap condition is more than worth it
We also get representation for every member of Team Avatar besides the lovable bald boy himself, with cards with Toph, Sokka, Zuko, Katara, Momo, and Appa
If a spell lets you perform an action "as you Cascade", you take this action after you've finished exiling cards with your Cascade ability but before choosing whether to cast an exiled non-land with the required mana cost