Find two elemental Symbols Lit up in the ring Wendel is standing in. Skylanders of those elements will get radiance bonuses when they complete a level. The Symbols Are,Going right in the index, magic(the star,element of dark spyro),water(a drop of water,element of slam bam),air(the spiral,element of whirlwind),undead(the skull,element of hex),tech(a gear,element of trigger happy),fire(the blaze,element of ignitor),earth(the mountain,element of bash) and life.(the leaf cluster,stealth elf's(elves?) Element.) Wendel will also tell you when you come in to the game with something like "Welcome! To earn today's Daily Bonus, summon your (tech gear) Tech and (fire blaze) Fire Skylanders like (tech gear) Drill Sergeant or (fire blaze) Ignitor."