In this Iron Hands ex Special Illustration Rare for Prismatic Evolutions , its artwork by Kazumasa Yasukuni manages to take that design further with an alien atmosphere background
The downside is that Muldrotha will be an instant target for your opponents to remove, letting you stick your Kotis for a bit longer
There are also other cards that can give more options to the Deck, such as: "Djinn of Rituals" monsters: if used for a Ritual Summon, they give that Ritual monster additional effects, such as immunity against Trap Cards, effects that target it, or even preventing the opponent from Special Summoning (Traditional only)
You can only use this effect of "Vulmina, Statue of the Sacred Dragon" once per turn
While Dragonmaid Tinkhec has its strengths, other cards like Dragonmaid Ernus or Dragonmaid Nudyarl may be more versatile and impactful in certain situations, so it's worth considering those options as well