Untap Endbringer during each other player's untap step. {T}: Endbringer deals 1 damage to any target. {C}, {T}: Target creature can't attack or block this turn. {C}{C}, {T}: Draw a card.
Menace When Goblin Dark-Dwellers enters, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
Search your library for up to two basic Forest cards, reveal those cards, and put one onto the battlefield tapped and the rest into your hand. Then shuffle. Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, search your library for up to three basic Forest cards instead of two.
Equipped creature gets +2/+2 and has protection from black and from green. Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control. Equip {2}
Flash When Snapcaster Mage enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.
Flying Whenever a source an opponent controls deals damage to you or a permanent you control, you may have Flameblade Angel deal 1 damage to that source's controller.
Flying When Nephalia Moondrakes enters, target creature gains flying until end of turn. {4}{U}{U}, Exile Nephalia Moondrakes from your graveyard: Creatures you control gain flying until end of turn.
Trample Delirium — At the beginning of your upkeep, if there are four or more card types among cards in your graveyard, put three +1/+1 counters on Soul Swallower.
Being engulfed is just the beginning of the nightmare.
Hexproof, indestructible Insidious Mist can't block and can't be blocked. Whenever Insidious Mist attacks and isn't blocked, you may pay {2}{B}. If you do, transform it.