Due to Fatal Push, Splicer costing three mana is another hoop opponents have to go through to kill it
Any Planeswalker, token maker, creature with +1/+1 counters, artifact with charge counters, and so much more is downright abusive when fighting at the Selesnya Loft Gardens
The "card" you see facing out
Serendib Efreet (Creature) So good that it was banned along with Juggernaut and Kird Ape in Extended since the inception of the format
There are tons of great cards to buff flying creatures like Favorable Winds, Thunderclap Drake, and Kangee, Sky Warden, as well as cost reducers like Watcher of the Spheres and Warden of Evos Isle
The difference here being that Card not found is an instant, so it can actually blank opponents removal, thus being actual card advantage