Lattice + Iona

[clavio]

Does Mycosynth Lattice make Iona USELESS?

[Mark Sun]

12/1/2004 Mycosynth Lattice's second ability makes everything, in every zone of the game, colorless.

Not exactly useless, she still beats for 7 damage. But yes, in using Lattice you will evade the "Your opponents can't cast spells of the chosen color" clause from Iona.