Ghitu Lavarunner
Oracle Text
As long as there are two or more instant and/or sorcery cards in your graveyard, Ghitu Lavarunner gets +1/+0 and has haste.
Card Rulings
4/27/2018 If Ghitu Lavarunner loses haste after being declared as an attacker on the turn it comes under your control, it will continue to attack. It won’t be removed from combat. On the other hand, if it loses haste before your declare attackers step, it won’t be able to attack.
Turn 1: 1 mana Burn (Rift Bolt, Lighting Bolt, Lava Spike...did I mention there's 4 a piece of these)
Turn 2: Lavarunner then 1 mana Burn (Lighting Bolt, Lava Spike...maybe Wizard's Lightning) You've literally lost no momentum and you aren't giving your opponent extra information (or potentially a card).
It doesn't sound terrible to be honest. I kind of like the thought of "budget" Goblin Guide