These would be simpler than rituals but be in 32x32.

• Acid Cloud (cloud of some description)
• Aqua Bubble (a silver/blue bubble)
• Augment (a humanoid figure with a + sign)
• Chrysopoeia (similar to Thaumcraft's permutatio)
• Dandelion Winds (three lines of strong wind)
• Desaturate (a shank crumbling to pieces)
• Disarm (a sword falling out of a hand or a sword with a line/cross through it)
• Extend Sense (an eyeball overlapping an ear)
• Fey Light (a small ball of light)
• Geas (a brain with a chain on it)
• Growth Infusion (new growth/plant growth)
• Harvest (a bag with potatoes going into it)
• Life Drain (a zombie decaying perhaps)
• Nature's Scythe (a scythe or some falling leaves)
• Petal Shell (a pink bubble with a petal on it)
• Radiance (a white beam)
• Rose Thorns (some thorns)
• Sanctuary (a blue bubble with a humanoid figure shape in it)
• Saturate (a glowing shank)
• Shatter (a block decaying)
• Sky Soarer (a humanoid figure with an arrow behind them)
• Storm Cloud (a cloud with lightning)
• Time Stop (a watch with a line through it)
• Wildfire (fire, faintly green/orange)