yugioh speed duel cards vs regular Attack from the Deep Booster Pack 4 Konami Speed Duel Tutorial Part 1

Scry A low impact mechanic that simply helps up the consistency of your draws and has no impact on the gamestate at all

4 Kenrith, The Returned King Kenrith, the Returned King is there in the Command Zone for two reasons, a massive mana sink and giving you access to all the colors you could possibly need

You can only use this effect of "Heart of the Blue-Eyes" once per Duel

Deck Probability Calculator can provide the exact chances of opening a particular hand

She even offers strong combo potential, pairing with either Drogskol ReaverDrogskol Reaver, Lich's MasteryLich's Mastery, or Marina Vendrell's GrimoireMarina Vendrell's Grimoire (with some variants available) as two-card combos to cause near-infinite lifeloss