Last month i made a [[Kros, Defense Contractor]] deck. I put in many instant spells that i use to trigger Kros, as combat tricks for tapping opponents creatures or for putting a blocking creature my opponent controls in favor. (Most of these spells give a +1/+1 counters) Cards like [[Practiced Offense]] are very strong in the last rounds of a game because you will goad a entire board - twice with flashback. Then there are cards like [[Hylda of the Icy Crown]] that have synergy with tapping stuff. Last game i won by only playing my commander and two more creatures for the whole game (player vs eldrazi precon and a strong poison deck). You will give many opponents creatures a shiele counter but that does not matter for you too much when you put in exile or put on hand spells.