[3] Z-ARC Summoned "Supreme King Dragon Odd-Eyes" during Sylvio's turn with its own effect when Sylvio Pendulum Summoned
Play Other Cards for Free and Cost Reducers Two more related categories that are not included here are cards that play other cards for free, cheat things into play, and cost reducers, some of which can combine to make cards free, but that's not the focus here
Even so, with three copies set down, your opponent is definitely going to have a tough time getting their attacks through
Who doesnt love opening Pokemon TCG booster packs
The two Palkia cards being the most expensive make it seem as though it might be preferred to Dialga, but either one will pay for plenty of Pokmon TCG investment cards and unopened boosters
You get to counter a spell with Logic Knot unless an opponent pays X mana