mtg bloomburrow frog cards Splash Lasher [Bloomburrow] Simic Frogs - Bloomburrow Constructed

And several Eldrazi have cast triggers themselves, like Wastescape BattlemageWastescape Battlemage, Artisan of KozilekArtisan of Kozilek, and the infamous Emrakul, the Promised EndEmrakul, the Promised End (not in the precon, obvs)

Mortal Combat is a four mana Enchantment that simply lets you win the game if you have twenty or more Creatures in your graveyard at the beginning of the upkeep

and/or return target artifact card from your graveyard to your hand

Apart from the 6 basic lands, a Commander deck may not contain double cards and in the card selection for the deck you are also limited to the colors of your Commander

Once upon a time, split cards presented an opportunity for rules shenanigans where loopholes could be had