Discard all of the cards in your hand. Exile that many cards from the top of your library. Until end of turn, you may play those cards. The next spell you cast this turn costs 1 less to cast for each card discarded this way.
Legendary Creature - Orc Warrior
When Jagun Wingmate enters the battlefield, if it's the second creature to enter the battlefield under your control this turn, draw a card. WW: Return another target creature you control to its owner's hand.
Creature - Vampire Rogue 3B: Auxan Scoundrel gains flying and lifelink until end of turn. T, Sacrifice Auxan Scoundrel: Target player reveals their hand and discards a nonland card with converted mana cost equal to or less than the amount of life that player has lost this turn.
Goblin Mob Rouser1RR
Creature - Goblin Warrior 3RRT: Untap all other Goblin Creatures you control, each other goblin creatures you control gains haste until end of turn. You gain an extra combat step after this one. Activate this ability only if you control 6 or more creatures and during your second main step.
Shield of the Faithful2W
Buyback - Sacrifice a creature
Until end of turn, if non-combat damage would be dealt to creatrures you control, it is dealt to target creature an opponent controls instead. "Your faith will be a shield against your enemies, but sometimes a martyr is needed to renew it."
At the beginning of each combat, target creature you control with haste gains double strike until end of turn. 2RR, T: Target creature gains haste until end of turn.
Hand of the Guildless3BB
Creature - Gorgon Assassin
When Hand of the Guildless enters the battlefield, each player sacrifices a multicolored creature.
Whenever a multicolored creature dies, you may pay B. If you do, you draw a card and lose 1 life.
Discovery at Koilos1U
Enchantment - Saga
<1> Create a 1/1 colorless Thopter artifact creature token with flying.
<2> This turn, target creature can't be blocked and gains "When this card deals combat damage to a player, draw a card, then discard a card".
<3> Until your next turn, creatures you control get +0/+1 and creatures your opponents control get -1/-0.
Should be obvious enough how you're supposed to use it with Brago.
Erthe, Unborn SpiritGG
Legendary Creature - Spirit
When Erthe, Unborn Spirit dies and at the beginning of your upkeep, search your library for a Forest card, put it on the battlefield tapped, then shuffle your library.
When Erthe, Unborn Spirit is put into your graveyard from anywhere, return him to the bottom of your library.
Create a token copy of an aura you control and attach it to another permanent you control.
You may cast an enchantment spell with CMC of 3 or less without paying its casting cost.