Avatar Roku, Firebender asks for cards like Electro, Assaulting Battery, Zuko, Exiled Prince, and Vedalken Orrery
Id recommend pairing this big Mardu dog with cards like Mesmeric Orb and Faithless Looting variants to fill the yard
If that damage is enough to be lethal damage, the creature will be destroyed, even if it still has more shield counters on it
About 3/4ths through the box I saw a black border and was super pumped
This can effectively double the damage all of your creatures deal to opponents, but will not add to the lifelink effect shared by multiple creatures
Thats best on a fetch land, which generates three landfall triggers (one when it returns to play, and two for cracking it twice), which means a lot of Scute Swarms