Kuro's Taken can be a decent filler card
Some prime examples are the likes of Floriferous Vinewall or Gatecreeper Vine, the latter being my favorite one as its reliable and you could end up with a gate to fix your mana, like Black Dragon Gate or the game-changing Basilisk Gate
Drogskol Reaver never made a massive impact in the game, but was nonetheless a really cool design that got players excited for all the right reasons
Pluto, Guard Dog The Best Dog Just Got Even Better Amber Steel players rejoice, as an undamaged Pluto, Guard Dog can provide protection for your low cost, low Willpower Amber cards while also providing some much-needed Strength early on
When you look at Onakkes low mana value, coupled with the potent six-mana recursion ability, I find this card to be a welcome breath of fresh air into the Superfriends archetype