Some ideas, that I called the "Minor Spells"
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Disturb (1
)
Target creature won't attack next turn.
Air balloon (1
)
Target creature gain "airborne" skill and loses it if damaged.
Blindness (1
)
All creatures have 50% chance to miss next turn.
Disease (1
)
Target creature has damage halved for next 3 turns.
Bury (1
)
Target creature is now burrowed (1
to unburrow)
Shuffle (1
)
Shuffle your opponent's deck.
Heat (1
)
All frozen creatures become unfrozed.
Battering ram (1
)
Your creatures ignore shield effects this turn.
Fertile (1
)
All permanents played this turn have effects doubled for 3 turns
Willpower (1
)
Target creature won't die this turn and stay at 1 HP minimum.
Forgotten task (1
)
Your opponent won't draw next turn.
Cold (1
)
All frozen creatures will stay frozen 1 more turn.
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I'm not very good doing art, some I'm posting here my ideas...