Dreaming Step, Shizuku

/:Harmony (When your other unit is placed in the same column as this unit, both units become in harmony until end of turn) /:[Choose a grade 3 card from your hand, and discard it] When this unit attacks a vanguard, you may pay the cost. If you do, this unit gets +5000 until end of that battle. If this unit is in harmony, look at five cards from the top of your deck, search for up to one grade 3 card from among them, reveal it to your opponent, put it into your hand, and shuffle your deck.