Emissary Green seems overcosted at five mana for a 3/3 that must attack before you get any benefit, either Treasures or +1/+1 counters depending on how all the players vote (you should vote security yourself to boost Emissary Green large enough to survive combat)
If you can do weird life total stuff, though, this could be a fun puzzle piece
1 pack : 6 cards (Total 127 types) + Index 1pc Rarity: Leader Card x 8, Common x 45, Uncommon x 32, Rare x 26, Super Rare x 10, Secret Rare x 2, Special Card x 4 *27 types of parallel card included in this product.
Snapcaster Mage also enables you to sneak out unexpected counterspells, or flash a blocker onto an empty board and then buff it with a combat trick to destroy an attacker
Overall good appearance with minor flaws