If you see a large creature and a removal spell, you can choose which card becomes your hidden threat and which card goes to the graveyard
If it is an aura deck specifically (and the target creature does not have summoning sickness), you immediately get a 4-in-1 or 5-in-1 as early as turn two or turn three
That means you can cast them for any color mana, even colorless
A few notable cards it pairs with for 2-card infinite combos include: #40
Its got Trample, which is a neat way to cause some damage, but its the second part of its abilities that will cause the most impact
Aphetto Alchemist Cat-Owl Clock of Omens Corridor Monitor Dee Kay, Finder of the Lost Dross Scorpion Elder Druid Filigree Sages Galvanic Key Hyperion Blacksmith Iceberg Titan Infuse Janjeet Sentry Jolt Magus of the Unseen Mind Over Matter Mirran Spy Nature's Chosen Sewer-veillance Cam Staff of Domination Tezzeret, Cruel Captain Trickster Mage Twiddle Twitch Voltaic Construct Voltaic Key Voltaic Servant