Now that you understand what is a triggered ability in MTG and how the different types work, you can spot these effects on cards and plan around them
A little bit of self mill to get some options into your graveyard, go wide with Helm of the Host and then stacking up damage with Dictate of the Twin Gods or Relentless Assault
Most Modern mana bases have a lot of nonbasic lands, which means that a well-timed Blood Moon can lock your opponent out of the game entirely
Stupid Goblin Chainwhirler had to dampen its highly anticipated return to Magic, but the number of threats Green has right now makes it impossible to not run a playset
Each have an LED inside, and can be individually turned on via the back of the crystal
By multiplying effects that trigger only during upkeep, Obeka can handily amass a whole army of tokens, or even burn opponents to death before they reach their next turn