A creature with trample that is blocked by another creature deals damage as normal, however, if the blocking creature's toughness is less than power of the creature with trample, the remaining difference is dealt as damage to the opponent
Being able to produce one mana of any color allows for a more varied deck, without having to put in a bunch of lands to power a couple of cards
The mechanic has largely been able to hold on to its red flavor with risks associated by using it at the wrong moment
Grove of the Burnwillows (EOS) $7.39 Grove of the Burnwillows is a fun nod to MTGs past, as giving your opponent 1 life can be better or worse than losing 1 life yourself based on how aggressive or controlling your deck is
you'll need a way to cast it for an alternative cost or without paying its mana cost, such as by suspending it
Though having your opponents creatures to swing out with is good, just having it locked down under your control can also be a big win.