When Vrestin enters, create X 1/1 green and white Alien Insect creature tokens with flying.
Whenever you attack with one or more Insects, put a +1/+1 counter on each of them.
Cast Vrestin for as much X as possible to flood the board with flying Insect tokens, then snowball with +1/+1 counters every combat. You build a wide, evasive Insect army that grows on attack, overwhelming the table by mid-game with counter synergies and anthem effects.
Immediate, scalable board presence the turn Vrestin lands
Evasive flying tokens that dodge most blockers
Built-in counter engine that pumps the whole team each attack
Operates well in both go-wide tokens and +1/+1 counter strategies
Cheap commander that can be recast even after a wipe
Heavily reliant on Vrestin sticking; loses steam if she's repeatedly removed
X counters lost on Vrestin if she's killed (only tokens remain)
Board wipes are devastating to a token-based strategy
GW lacks strong interaction and card advantage compared to other colors
Tokens are individually fragile 1/1s vulnerable to sweepers and pingers