Bumbleflower on the battlefield, you make one of your opponents draw a card (Im sure you can see the politics of that coming into play already)
Well, Ariel, Sonic Warrior is a Floodborn character, who costs 6 Ink to play
Most often this is a mechanical thing, such as Gisela, Blade of Goldnight trying to put a huge clock on the game or Jori En, Ruin Diver trying to trigger her draw effect as often as possible
The surviving elder dragons of the Dragon War were killed by one another in power struggles or resurrected as spirits, like Ugin
There are also formidable cheap removal spells for early drops (such as Depressurize and Plasma Bolt) and excellent ramp creatures (like Galactic Wayfarer and Zookeeper Mechan)
As you may have guessed, cards from the Shadowless set won't have "First Edition" written on them, giving you a chance to tell them apart from the Base Set's First Edition Pokmon cards