I guess you never made good illusion deck if you say so. Today illusion is suited to draw rares much worse than scepter of summoning alone, and is very resource-expensive. Rare cards from enemy deck are expended after you play them.
On the countrary, cheap and abundant nature cards can be easily chain-played with enormous resource income due to ancient sage, resulting full hand of rares which are not expended after you play them.
Fithz Hood just made another card to make his beloved nature deck even more powerful =)