Hallar and Resourceful Defense on the battlefield.
You have a card in hand with kicker or multikicker.
You have a way to cause a creature to leave the battlefield.
({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) plus enough mana to cast the kicker spell kicked available.
Steps
Cast Body of Research by paying ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) , creating a 0/0 Fractal creature token, then putting a number of +1/+1 counters on it equal to your deck size.
Cause the Fractal to leave the battlefield.
Resouceful Defense triggers, putting a number of +1/+1 counters on Hallar equal to the number the Fractal had.
Cast any kicker or multikicker spell with kicker by paying its mana cost plus its kicker cost.
Hallar triggers, putting a +1/+1 counter on itself, then dealing damage equal to the number of +1/+1 counters on it to each opponent.