He sends three cards of his Deck to the Graveyard to use the first effect of "Devastar Okeabyss" to gain 500 ATK, rising from 3500 to 4000, before he pays 500 LP to use the second effect "Devastar Okeabyss", reducing his LP to 2700
Aether Rangers (Simic) Color Combo: Blue/Green Strategy: Exhaust Ramp Key Cards: Sita Varma, Masked Racer / Elvish Refueler / Rangers Refueler MTG Aetherdrifts Simic archetype wants you to stack your mana pool to take advantage of the powerful new Exhaust abilities introduced in the set
It's part of a rather forgettable trio and has never been competitively relevant
Deepchannel Duelist The untap any creature on your end step leads to lots of cool trickery, and counts as vigilance for your best merfolk
As soon as the cards starts coming back to you, trade a card that you do not need
Here, hes a password unlock who helpfully provides one extra card per win