Hexgold Slith
From Modern Horizons 3 set
Hexgold Slith
Creature — Slith
2/1
When this creature enters, you get
(two energy counters).
Whenever this creature attacks, you may pay
. If you do, it gains first strike until end of turn.
Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.