Though there are more types of double faced cards and other rules mostly to do with various other keywords and the way they can affect the handling of double faced cards the above will cover you for learning how to incorporate cards in your deck, along with the basics of how they work
Its probably best that, even if the player isnt focusing on the Kaiju archetype, they still utilize one or two Kaiju monsters
In Standard, including multiple basic lands is normal operating procedure, but that may cancel Esper Control as an option
On the other hand, the effect is also interesting, in addition to weak overall strengthening of water, you can lower the level of water not only in the field but also in your hand
on the opponent's turn using only a Lv4 on your field without using anything in your hand
Illusionary Forces (Ice Age/Alliances) What's better than a 3/2 flyer that can't be blocked for five mana