A cards color identity refers to which colored mana symbols appear on it
you are not yet dead on turn 3
However, unless you have the metagame dialed in, Id recommend choosing an S or A tier deck, as they represent the strongest choices in an open field
Yes, eBay is one of the most popular sites for selling Pokmon cards
Notably, this Selesnya Dino legend can be cheated into play as early as turn one(!) with the three-mana planeswalker Sorin, Imperious Bloodlords -3 ability, because in addition to being a Dino, its also a Vampire
Andrei probabilmente a giocare comunque qualche carta going first come There Can Be Only One o Summon Limit per cogliere di sorpresa lavversario, e carte come Cosmic Cyclone per evitare Anti-Spell o Skill Drain