Astalos

Flying, Double Strike
Plasma Charge - Whenever Astalos attacks, you may Inflict it with Thunderblight. If you do, Astalos gains +2/+0 until end of turn.
Thunderclad - Whenever Astalos deals combat
damage to a player while inflicted with Thunderblight, deal 2 damage to and Inflict target creature with Thunderblight.