They won't trigger during your third, fourth, or other additional main phases in a single turn, if effects somehow cause you to have more than two main phases
For example, if your commanders were Yasmin Khan and The Thirteenth Doctor (who's green and blue), your deck could include cards that were red, green, and/or blue
If you copy a Thundertrap Trainer with offspring, when the kid enters it also lets you look at the top four cards of your library and put one in your hand
These enchantments tend to be buffs, but one actually sets a creatures base power and toughness to 1/1, which is a great way to make a big enemy threat into something more manageable
The neat thing is that you can use it defensively to chump block some beefy flyer coming your way too
Instant Protection (CTRL to add secondary) Ramp Ramp (CTRL to add secondary) Recursion Recursion (CTRL to add secondary) Removal Removal (CTRL to add secondary) Sac Outlet Sac Outlet (CTRL to add secondary) Tokens Clavileo, First of the Blessed Whenever you attack, target attacking Vampire that isn't a Demon becomes a Demon in addition to its other types