Monsters like "Cheermole" and "Sword Fish" can manipulate ATK and DEF permanently in large increments and continue to do so if they can remain on the field while others like "Fire Mufflerlion" and "Spikeagle" grant bonuses for attacking by providing a second attack for one of your monsters and piercing damage respectively
This line of play is not uncommon on turn one: Land, Ritual, Therapy myself naming Wurm, Exhume, sac Wurm to flashback Therapy on you, make seven 1/1s, go
Being bound by space is no longer an issue
The favorite trick of many was to use this to tap down their opponents lands in their upkeep, particularly if you could get a good sacrifice synergy to get it out cheaper
[0]: Discard all the cards in your hand, then draw that many cards plus one
Sinnoh Generation Turtwig The Grass-type starter from the Sinnoh region