Not a pig, not a swarm of spiders, and not a clone
Theyre mono-colored creatures with an enemy-colored activated ability
These are subjective, of course, but look something like the following: Tier 1, which includes Austere Command, Merciless Eviction, Toxic Deluge, Damnation, and Wrath of God Tier 2, which includes Day of Judgment, Hour of Revelation, Decree of Pain, Cleansing Nova, Living Death, Winds of Abandon, and Fumigate Tier 3, which includes everything else thats not unplayable. The important thing to note with this kind of ordering is that my approach mirrors most closely that of Frank Karsten in his Limited Pick Order articlesthe worst card in Tier 1 is very close to the best in Tier 2, and so on
While its true that as the numbers get larger, it becomes more difficult to calculate attack damage and place damage counters, there is an added flexibility from the perspective of the game designers
You may choose only a nonland permanent that's already on the battlefield
It is one heck of a monster, though, as it can bounce cards your opponent controls equal to the number of Level 3 Psychic Tuners you control every single turn