Smuggler's Copter - Battle Bus [Secret Lair Drop Series] Dragon Sliver Sacrifice another creature: Untap Grimgrin

Sacrifice another creature: Untap Grimgrin and put a +1/+1 counter on it

Set: Jumpstart Type: Creature — Goblin Rarity: Rare Cost: {1}{R}{R} Haste (This creature can attack and {T} as soon as it comes under your control

Which tells us the way to go

Counter target spell

Round down each time

Smuggler's Copter - Battle Bus [Secret Lair Drop Series] Dragon Sliver Sacrifice another creature: Untap GrimgrinSet: Secret Lair Drop Series Type: Artifact Vehicle Rarity: Rare Cost: {2} Flying Whenever Smuggler's Copter attacks or blocks, you may draw a card. If you do, discard a card. Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.) Don't forget to thank the Bus Driver.