In the case of Sazh's Chocobo, when a land hits the battlefield, it gets a +1/+1 counter , meaning that the more lands you can play each turn, the more counters it gets, and despite starting as a 0/1 creature, it can become quite the hulking beast very quickly
You want to enchant your opponents creatures so that they cant attack and your opponents lose life each turn
Magic Dominaria United card list & price guide
The idea of the rule is simple: in the wake of fan-favorite LSV losing in the Top 8 of a recent Pro Tour after mulliganing to four in the last game of the finals, the London mulligan is designed to decrease the pain of mulliganing and the number of non-games that happen as the result of one player having a hand that simply doesn't do anything (like no lands, for example)
If Pumpkin Bombs is no longer on the battlefield as its ability resolves, use the number of fuse counters on it as it last existed on the battlefield to determine how much damage is dealt
What if instead of desperately trying to keep up with three opponents, we instead just calmly rode in their wake