Hive mind can come out on turn 4 and then you cast a 0 cost spell of a mana type your opponent doesn't have.
Turn 1 play a single land and
amulet of vigor.
Turn 2 play a double mana land.
Turn 3 play a single land and the creature that let's you drop two lands and play a double mana land.
Turn 4 play up to two lands, play
Hive mind and a spell that the opponent won't be able to pay the cost of or die.
You can search for a 0 casting cost spell with a land. Also there's a tutor in case you can't find
Hive mind.
You also have 0 cost
counterspell just in case they try to stop you.