If the triggered ability divides damage or distributes counters among a number of targets (for example, the ability of Bogardan Hellkite), the division and number of targets can't be changed
The sight of a large Fusion Monster suddenly appearing to catch the opponent off guard as they start their first-turn play, and then deciding the game with a non-targeting destruction, shows enough presence as a pioneer of going-second turn-0 Fusion
Most Atraxa decks take advantage of her triggered ability to proliferate counters on permanents, including Planeswalkers
Exalted Sunborn (EOE) $26.33 Exalted Sunborn has a pretty good pedigree from token-doubling effects that are staples in EDH, and its a card that can see play in formats like Standard and Pioneer
Sage of Ancient Lore immediately becomes a 10/10 or bigger - great if you can give it haste
A wise way to draw multiple cards in Competitive REL events is to first put the drawn cards on the table face down, count them carefully, and then move them to your hand