Emerald Lorcana cards tend to prioritise defence and effects over strength, which you could choose to balance by combining it with a more challenge-focused colour such as ruby or support with the protective powers of amber or amethyst
Notably, not attacking with one creature in the log doesn't make the others automatically unblockable
Jumpstart is still the fresh and exciting thing, and its set to make a tremendous impact on Historic (and potentially Legacy)
When it doesn't work, i.e
1 Liliana, Dreadhorde General - JP Alternate Art Mythic Rare - $80.82 War of the Spark brought with it plenty of special variants for collectors to collect, but the most valuable of them is the exceptionally special Japanese Alternate Art version of Liliana, Dreadhorde General by legendary artist Yoshitaka Amano
However, Vivi Ortnitier would be right at home in an enchantment or artifact-heavy deck too