You can simply use cards like Infectious Inquiry and Vraska's Fall to spread poison around and sit behind your massive creatures while proliferate cards like Vraska, Betrayal's Sting and Evolution Sage slowly kill your opponents
Goblin Chieftain On its own, a little 1/1 goblin token (or even a few of them) isn't that much of a threat
A 2/4 is pretty mediocre for four mana in this day and age, and its ability seems very non-tricky because it is always face-up on the table
Reiki, the History of Kamigawa draws you cards, Garruk, Caller of Beasts helps you find creatures, Captain Sisay tutors for legends, Chief Jim Hopper creates Clue tokens to help you draw cards, and Old Gnawbone gives you Treasure tokens
There are a lot of must-haves that take your deck's power level to the next level regardless of what creature type your deck is built around
(This includes manifest, disguise, cloak, morph, and a few older effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield
