Boast ties a large part of your creatures value into attacking, which feels like a relieving de-escalation from an environment where most playable cards get their value on ETB (or even earlier in the case of adventures!) Even more interesting, the range of payoffs for boast are extremely open-ended, including all sorts of utility effects and other incentives not normally associated with attacking
The ability to play Shatterskull Smashing as a Red-producing land - possibly untapped and on demand - might win the game
Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) If multiple creatures with lifelink you control deal combat damage at the same time, the damage dealt by each of those creatures is a separate life-gaining event and Amalia Benavides Aguirre's ability will trigger that many times
In between each turn (so after one player's turn ends, but before the other player's turn starts) there is a Pokmon checkup step, in which both players: Check for special conditions on their Pokmon, in the order shown above