//// Prowl, Pursuit Vehicle Color indicator: white Legendary Artifact Vehicle 2/3 Living metal (As long as it's your turn, this Vehicle is also a creature.) Whenever another creature or Vehicle enters the battlefield under your control, put a +1/+1 counter on Prowl
There are also a few cards that dont quite fit into the archetypes of the preconstructed decks, Virtue and Valor and Fae Dominion
There are cards that care specifically about Birds, like: Kastral, the WindcrestedKastral, the Windcrested
Classic options like Llanowar Elves and Elvish Mystic slowly growing are fine with Tyvar, but what about the elves that tap for lots of mana
Maybe can get away with in a deck with lots of cycling to find the lands you need to cast it
As a 1/1 for 2 that gives +2/+0 to creatures when they enter, it's nice, but does this really turn a loss into a win or let you close a game