Ninjask: Not only is it one of the fastest bug pokemon, it gets faster the longer it stays in battle, and in flavor text can sometimes be so fast that its opponent's can hardly see it
Taeko, the Patient Avalanche This four-mana mono-Blue 4/5 Turtle Ninja ETBs tapped, and then when another dork you control leaves without dying, you can scry 1 and toss a +1/+1 counter here
You also want to do that while Tergrid is in play to get free permanents
A word to those trying this, however: make sure you dont have an empty Bench when using this kind of card
Some random Show and Tell thing with and Emrakul is OK but casting that Emrakul for two mana at instant speed is a whole lot more powerful and substantially lower risk
Commanders like Emmara, Soul of the Accord and Annie Flash, the Veteran want as many ways as possible to tap them outside combat, even if the mana isn't necessary