Anyhow, because Oakhame Adversary has deathtouch, even 1 damage is lethal
It comes in as a 10/9 with annihilator 2 and has an on-cast ability to return a creature from your graveyard to the battlefield
Wildsear, Scouring Maw appears designed to support Bello, Bard of the Brambles due to its fantastic ability to turn some non-Aura enchantments into 4/4 Elemental creatures with indestructible, haste, and Whenever this creature deals combat damage to a player, draw a card. Chishiro, the Shattered Blade and Kaima, the Fractured Calm are two other enchant-centric commanders that could utilize Wildsear, Scouring Maw
No, not without flash enablers
If you want the app with the biggest community and the most cross-platform support, ManaBox is still the default recommendation
It was the fastest-selling expansion in Magic: The Gathering history, per Hasbro