#5 Katara, the Fearless (Borderless) (Neon Ink Foil) From a lore standpoint, Katara is one of the strongest characters in Avatar: The Last Airbender, and also an incredibly solid one
The Marvel precons will include some, but additional cheap interaction (counters for blue decks, removal for black and white) significantly improves a decks competitiveness
If more than one creature enters the battlefield at the same time, or if one or more other creatures enter the battlefield at the same time that Griffin Protector enters the battlefield, Griffin Protector's triggered ability triggers for each of them
Copy that spell
For example, imagine my opponent attacks me with [c]Artisan of Kozilek[/c], which has annihilator 2
A control deck is one that avoids racing and attempts to slow the game down by executing an attrition plan