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How to get three wins on Sylvan and four on Rune? Go to the TotG arena twice and easily get 4-1, excluding the usual raid boss.
The new pack rotation is surprisingly fun to play with these once-terrible classes, and it helps that the old, overpowered cards from other factions have been heavily nerfed. And even here, there's a super-abuse strategy with the Dungeon, hehe.