I've been toying around with a few ideas for stone linker spells that have different effects depending on the guemlite type of the character that plays them (like elemental might). Here's a few ideas:
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Reclamation (R)
Stone Linker
Spell Earth – Spell Water
Duration: 3 turns
Choose up to two stone hearts in your discard pile; they are played following your cards this turn.
Earth Guemlite: At the end of the third turn, heal 1 for each Earth Guemlite in play (living or dead).
Water Guemlite: Choose a card in the opposing discard pile. This card is removed from the game.
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Dust Bowl (U)
Stone Linker
Spell Air – Spell Earth
Duration: 4 turns
The opposing characters have Attack –1 and Defence -1.
Earth Guemlite: At the end of every second turn, the opposing characters suffer 1 direct damage.
Air Guemlite: Additional duration of 2 turns.
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Magma Chamber (U)
Stone Linker
Spell Earth – Spell Fire
Duration: 3 turns
Your stone linkers have Attack +1 and Defence +1 for each stone heart attached to them.
Fire Guemlite: A fire stone heart is created and played following your cards this turn.
Earth Guemlite: An earth stone heart is created and played following your cards this turn.
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Discussion

Reclamation is a cool card that gives an offensive option to earth (or fire) stone heart decks, and it has great symmetry with Tame the Elements. The water guemlite effect can help neuter tornado abusers.

Dust bowl is a nice air spell that i) isn't totally broken if spammed by maen, and ii) is in line with the debuffing and team effect themes of the other stone linker air cards. The combined effect gives a useful niche to catalyna and Lazar.

Magma chamber is another nice offensive option for earth and fire stone heart decks (and is great for Kalion). It gives stone heart stacking decks a modest boost, but one that doesn't rely on having to reactivate stone hearts all the time.

I made spells like this too.