Even now, I would contend that Uril is the face of the Voltron archetype
Pick a commander, draft a list with the AI deck builder, tune the curve in the deck analyzer, and price out your upgrades on the card pricing tool
These are limited to the headlining ex Pokmon for each booster pack and use their Two Star designs with flashy gold background art
According to the rules the process of casting creature cards (or any other non-land cards) consists of the following stages: you put a creature card on the stack, define its total casting cost and it locks in, then you get a chance to activate mana abilities (but only if the total cost requires mana), and, finally, you pay the cost
You could of course play Ghastly Death Tyrant or Shatter the Oath, but nobody in their right mind would do that except if it fits their decks plan